Linux-Dictionary ( $ - A )

Table of Contents
1. Linux Dictionary
    Punctuation
    A
    B
    C
    D
    E
    F
    G
    H
    I
    J
    K
    L
    M
    N
    O
    P
    Q
    R
    S
    T
    U
    V
    W
    X
    Y
    Z
   
   
A. About the Author
B. Contributors
C. Disclaimer
D. Donations
E. Feedback
Bibliography
F. GNU Free Documentation License
    F.1. PREAMBLE
    F.2. APPLICABILITY AND DEFINITIONS
    F.3. VERBATIM COPYING
    F.4. COPYING IN QUANTITY
    F.5. MODIFICATIONS
    F.6. COMBINING DOCUMENTS
    F.7. COLLECTIONS OF DOCUMENTS
    F.8. AGGREGATION WITH INDEPENDENT WORKS
    F.9. TRANSLATION
    F.10. TERMINATION
    F.11. FUTURE REVISIONS OF THIS LICENSE
    F.12. ADDENDUM: How to use this License for your documents

Chapter 1. Linux Dictionary
Punctuation
$BASH environment variable
Expands to the full pathname used to invoke this instance of bash. 
$BASH_VERSION environment variable
Expands to the version number of this instance of bash. 
$CDPATH environment variable
The search path for the cd command. This is a colon-separated list of directories in which the shell looks for destination directories specified by the cd command. A sample value is ``.:~:/usr''. 
$ENV environment variable
If this parameter is set when bash is executing a shell script, its value is interpreted as a filename containing commands to initialize the shell, as in .bashrc. The value of ENV is subjected to parameter expansion, command substitution, and arithmetic expansion before being interpreted as a pathname. PATH is not used to search for the resultant pathname. 
$FIGNORE environment variable
A colon-separated list of suffixes to ignore when performing filename completion (see READLINE below). A filename whose suffix matches one of the entries in FIGNORE is excluded from the list of matched filenames. A sample value is ``.o:~''. 
$HISTCMD environment variable
The history number, or index in the history list, of the current command. If HISTCMD is unset, it loses its special properties, even if it is subsequently reset. 
$HISTCONTROL environment variable
If set to a value of ignorespace, lines which begin with a space character are not entered on the history list. If set to a value of ignoredups, lines matching the last history line are not entered. A value of ignoreboth combines the two options. If unset, or if set to any other value than those above, all lines read by the parser are saved on the history list. 
$HISTFILE environment variable
The name of the file in which command history is saved. (See HISTORY below.) The default value is ~/.bash_history. If unset, the command history is not saved when an interactive shell exits. 
$HISTFILESIZE environment variable
The maximum number of lines contained in the history file. When this variable is assigned a value, the history file is truncated, if necessary, to contain no more than that number of lines. The default value is 500. 
$HISTSIZE environment variable
The number of commands to remember in the command history (see HISTORY below). The default value is 500. 
$HOME environment variable
The home directory of the current user; the default argument for the cd builtin command. 
$HOSTFILE
Contains the name of a file in the same format as /etc/hosts that should be read when the shell needs to complete a hostname. The file may be changed interactively; the next time hostname completion is attempted bash adds the contents of the new file to the already existing database. 
$HOSTTYPE
Automatically set to a string that uniquely describes the type of machine on which bash is executing. The default is system-dependent. 
$IFS
In UNIX, the $IFS variable separates commands. It is usually conigured to be the semicolon (;) and newline characters. However, it can be reconfigured to be other characters as well. Data-driven attacks will sometimes seek to reset the IFS variable (e.g. IFS=x), then cause execution within the data field wihtout having to insert shell metacharacters. Tidbit: On Linux, the $FF variable may also be used like $IFS. 
$IFS
The Internal Field Separator that is used for word splitting after expansion and to split lines into words with the read builtin command. The default value is ``<space><tab><newline>''. 
$IGNOREEOF
Controls the action of the shell on receipt of an EOF character as the sole input. If set, the value is the number of consecutive EOF characters typed as the first characters on an input line before bash exits. If the variable exists but does not have a numeric value, or has no value, the default value is 10. If it does not exist, EOF signifies the end of input to the shell. This is only in effect for interactive shells. 
$INPUTRC environment variable
The filename for the readline startup file, overriding the default of ~/.inputrc (see READLINE below). 
$LINENO
Each time this parameter is referenced, the shell substitutes a decimal number representing the current sequential line number (starting with 1) within a script or function. When not in a script or function, the value substituted is not guaranteed to be meaningful. When in a function, the value is not the number of the source line that the command appears on (that information has been lost by the time the function is executed), but is an approximation of the number of simple commands executed in the current function. If LINENO is unset, it loses its special properties, even if it is subsequently reset. 
$MAIL
If this parameter is set to a filename and the MAILPATH variable is not set, bash informs the user of the arrival of mail in the specified file. 
$MAILCHECK
Specifies how often (in seconds) bash checks for mail. The default is 60 seconds. When it is time to check for mail, the shell does so before prompting. If this variable is unset, the shell disables mail checking. 
$MAILPATH
A colon-separated list of pathnames to be checked for mail. The message to be printed may be specified by separating the pathname from the message with a `?'. $_ stands for the name of the current mailfile. Example: MAILPATH='/usr/spool/mail/bfox?"You have mail":~/shell-mail?"$_ has mail!"' Bash supplies a default value for this variable, but the location of the user mail files that it uses is system dependent (e.g., /usr/spool/mail/$USER). 
$MAIL_WARNING
If set, and a file that bash is checking for mail has been accessed since the last time it was checked, the message ``The mail in mailfile has been read'' is printed. 
$OLDPWD
The previous working directory as set by the cd command. 
$OSTYPE
Automatically set to a string that describes the operating system on which bash is executing. The default is system-dependent. 
$PATH
The search path for commands. It is a colon-separated list of directories in which the shell looks for commands (see COMMAND EXECUTION below). The default path is system-dependent, and is set by the administrator who installs bash. A common value is ``/usr/gnu/bin:/usr/local/bin:/usr/ucb:/bin:/usr/bin:.''. 
$PATH
The shell looks for commands and programs in a list of file paths stored in the PATH environment variable. An environment variable stores information in a place where other programs and commands can access it. Environment variables store information such as the shell that you are using, your login name, and your current working directory. To see a list of all the environment variables currently defined; type 'set' at the prompt. When you type a command at the shell prompt, the shell will look for that command's program file in each directory listed in the PATH variable, in order. The first program found matching the command you typed will be run. If the command's program file is not in a directory listed in you PATH environment variable, the shell returns a "commands not found" error. By default, the shell does not look in your current working directory or your home directory for commands This is really a security mechanism so that you don't execute programs by accident. What if a malicious user put a harmful program called ls in your home directory? If you typed ls and the shell looked for the fake program in your home directory before the real program in the /bin directory, what do you think woul dhappen? If you thought bad things, you are on the right track. Since your PATH doesn't have the current directory as one of its search locations, programs in your current directory must be called with an absolute path of a relative path specified as './program-name'. To see what directories are part of your PATH enter this command: # echo $PATH /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/bin/X11 From Complete-Idiot's Guide to Linux
$PROMPT_COMMAND
If set, the value is executed as a command prior to issuing each primary prompt. 
$PS1
The value of this parameter is expanded (see PROMPTING below) and used as the primary prompt string. The default value is ``bash\$ ''. 
$PS2
The value of this parameter is expanded and used as the secondary prompt string. The default is ``> ''. 
$PS3
The value of this parameter is used as the prompt for the select command (see SHELL GRAMMAR above). 
$PS4
The value of this parameter is expanded and the value is printed before each command bash displays during an execution trace. The first character of PS4 is replicated multiple times, as necessary, to indicate multiple levels of indirection. The default is ``+ ''. 
$PWD
The current working directory as set by the cd command. 
$RANDOM
Each time this parameter is referenced, a random integer is generated. The sequence of random numbers may be initialized by assigning a value to RANDOM. If RANDOM is unset, it loses its special properties, even if it is subsequently reset. 
$SECONDS
Each time this parameter is referenced, the number of seconds since shell invocation is returned. If a value is assigned to SECONDS. the value returned upon subsequent references is the number of seconds since the assignment plus the value assigned. If SECONDS is unset, it loses its special properties, even if it is subsequently reset. 
$SHLVL
Incremented by one each time an instance of bash is started. 
.#01
and higher A method of numbering picture files for a roll of film that has been scanned for computer presentation 
.$$$
Used by OS/2 to keep track of archived files 
.(Pagis)
native format 
.000
Data file (GEOWorks) 
.000-20009
Used to number old (backup) versions of files (for example, CONFIG.SYS when changed by an installation program); also used to number 
.001-999
Database index files used by (Superbase) 
.1-STEP
Backup file (Iomega Backup) 
.113
Backup data file (Iomega Backup) 
.123
Lotus 123 97 file 
.12M
Smartmaster file (Lotus 1-2-3 '97) 
.1ST
Documenting wizard list (Microsoft Visual FoxPro) 
.2D
Two-dimensional drawing file (VersaCAD) (http://www.versacad.com/vcadhome.htm) 
.2GR
and 3GR VGA Graphics driver/configuration files (Microsoft Windows) 
.386
A file for use in an 80386 or higher microprocessor 
.3D
Three-dimensional drawing file (VersaCAD) (http://www.versacad.com/vcadhome.htm) 
.3DM
3D NURBS modeler, (Rhino) 
.3DS
A file in 3D Studio (for DOS) format 
.411
Data file (Used by digital cameras) 
.4GE
Compiled code (Informix 4GL) 
.4GL
Source code (Informix 4GL) 
.4V
Music file (Quartet) 
.669
Music mod file (Composer 669)(Unis Composer) 
.669
Tracker module (Composer 669) 
.8
Source file (Assembly) (Similar to Microsoft Assembler) 
.@@@
Screen files used in the installation and instruction on use of such applications as Microsoft Codeview for C 
.a
Archive. lib*.a is a static library. 
.A
Library file (Unix) 
.A
Object code library 
.A3L
Authorware 3.x library 
.A3M
Authorware MacIntosh file (unpackaged) 
.A3W
Authorware Windows file (unpackaged) 
.A4L
Authorware 4.x library 
.A4M
Authorware MacIntosh file (unpackaged) 
.A4P
Authorware file (packaged without runtime) 
.A4W
Authorware Windows file (unpackaged) 
.A5L
Authorware 5.x library 
.A5W
Authorware Windows file (unpackaged) 
.AA
Audible audio file (commonly used for downloadable audio books) 
.AAM
Authorware shocked file 
.AAS
Authorware shocked packet 
.AB
Applix Builder file 
.ABF
Adobe Binary Screen Font 
.ABK
Backup file (PrintMaster Gold) 
.ABK
Corel Draw AutoBackup 
.ABM
Audio album file (HitPlayer) 
.ABO
Applix Builder Turbo file 
.ABS
MPEG Audio Sound file 
.ABS
Sometimes used to denote an abstract (as in an abstract or summary of a scientific paper) AutoBackup 
.ABS
Standard GNU compiler output file for a PC platform 
.ACA
HTTP animation file (Microsoft Agent) 
.ACA
Project Manager Workbench file 
.ACB
ACBM Graphic image 
.ACC
DR-DOS Viewmax file 
.ACD
Character definiton file (Microsoft Agent) 
.ACE
ACE Archiver Compression <http://searchStorage.techtarget.com/sDefinition/0,,sid5_gci211828,00.html> file 
.ACF
HTTP character file (Microsoft Agent) 
.ACI
ACI development appraisal (ACIWEB) 
.ACL
Corel Draw 6 keyboard accelerator file 
.ACM
Dynamic Link Library (DLL) 
.ACM
Interplay compressed sound file (Fallout 1,2, Baulder's Gate) 
.ACM
Windows system directory file 
.ACP
Microsoft Office Assistant Preview file 
.ACR
American College of Radiology file 
.ACS
Character structered storage file (Microsoft Agent) 
.ACT
Action Presentation 
.ACT
Documenting wizard action diagram (Microsoft Visual FoxPro) 
.ACT
FoxPro Foxdoc Action Diagram 
.ACT
Microsoft Office Assistant Actor file 
.ACV
Used to Compress and decompress audio data 
.AD
After Dark screensaver 
.Ada
<http://search390.techtarget.com/sDefinition/0,,sid10_gci211523,00.html> Ada source text file (non-GNAT) 
.ADB
Ada source text body file (GNAT) 
.ADB
HP 100LX Organizer Appointment database 
.ADC
Scanstudio 16 color Bitmap Graphic file 
.ADD
OS/2 adapter driver file used in the boot process 
.ADF
Amiga <http://WhatIs.techtarget.com/definition/0,,sid9_gci211557,00.html> disk file 
.ADI
AutoCAD device-independent binary plotter file 
.ADL
QEMM Mca adaptor description library 
.ADM
After Dark MultiModule screensaver (Microsoft) 
.ADM
Windows NT <http://searchWin2000.techtarget.com/sDefinition/0,,sid1_gci213368,00.html> policy template 
.ADN
Lotus 1-2-3 Add-In file 
.ADP
Astound Dynamite file 
.ADP
Dynamic Page file (AOLserver) 
.ADP
FaxWorks Faxmodem setup file 
.ADR
After Dark Randomizer screensaver 
.ADR
Smart Address address book 
.ADS
Ada source text specification file (GNAT) 
.ADT
AdTech Fax file 
.ADT
HP NewWave datafile for card applications 
.ADX
Archetype Designer Document 
.ADX
Dynazip Active Delivery script 
.ADX
Lotus Approach dBase Index 
.ADZ
Packed ADF file (Extracts with WinZip) 
.AE
Author/Editor file (SoftQuad) 
.AEP
ArcExplorer project file 
.AF2
ABC FlowCharter 2.0 Flowchart 
.AF3
ABC Flowchart 
.AFC
Apple Sound file 
.AFI
Truevision Bitmap graphic 
.AFM
Adobe metrics 
.AFM
HP NewWave Cardfile application 
.AG
Applix graphic 
.AI
Adobe Illustrator drawing 
.AI
Corel Trace drawing 
.AIF
Audio Interchange File, a sound format used by Silicon Graphics and Macintosh applications 
.AIFC
Similar to AIF (compressed) 
.AIFF
<http://WhatIs.techtarget.com/definition/0,,sid9_gci213472,00.html> Similar to AIF 
.AIM
AOL Instant Messenger Launch file 
.AIN
AIN Compressed archive 
.AIO
APL transfer file 
.AIS
ACDSee Image Sequence 
.AIS
Velvet Studio Instruments file 
.AIS
Xerox Arry of Intensity Samples Graphic 
.AIX
HP NewWave Cardfile Application data 
.AKW
Contains all A-keywords in the RoboHELP Help Project Index Designer not associated with topics 
.ALAW
European Telephony audio 
.ALB
JASC Image Commander album 
.ALI
Document file (SAP proprietary format) 
.ALIAS
Alias Image 
.alias
X Window System font alias catalog. 
.ALL
Arts & Letters Library 
.ALL
WordPerfect for Windows General printer information file 
.ALS
Alias Image 
.ALT
WordPerfect Library Menu 
.AM
Applix SHELF Macro 
.AMF
DSMIA/Asylum module music (Crusader,No Remorse,Aladdin) 
.AMF
Music file (Advanced Module Format) 
.AMG
ACTOR System image 
.AMG
AMGC Compressed archive 
.AMI
Annotation file (Cocreate SolidDesigner) 
.AMS
Extreme's Tracker module 
.AMS
Velvet Studio music module (MOD) file 
.AN
Text file (Sterling Software) (Groundworks COOL Business Team Model) 
.ANC
Canon Computer Pattern Maker file that is a selectable list of 
.ANI
Microsoft Windows Animated cursor 
.ANM
DeluxPaint Animation 
.ANN
Windows 3.x Help annotation 
.ANS
ANSI <http://searchCIO.techtarget.com/sDefinition/0,,sid19_gci213776,00.html> Text file 
.ANT
SimAnt for Windows saved game 
.AOS
Nokia 9000 Add-on software 
.AOT
Applicatio binary object template file (ZenWorks snAPPshot) 
.AP
Applix Presents file 
.AP
WHAP Compressed Amiga archive 
.APC
Compiled application file (Centura Team Developer) 
.APC
Lotus 1-2-3 Printer driver 
.APD
Dynamic application library file (Centura Team Developer) 
.APD
Lotus 1-2-3 Printer driver 
.APF
Lotus 1-2-3 Printer driver 
.APF
Project file (Allaire) (Created by Homesite) 
.API
Application Program Interface; used by Adobe Acrobat <http://searchCIO.techtarget.com/sDefinition/0,,sid19_gci211517,00.html> 
.API
Lotus 1-2-3 Printer driver 
.APL
APL Workspace file 
.APL
Application library file (Centura Team Developer) 
.APP
dBase Application Generator Object 
.APP
DR-DOS Executable Application 
.APP
FoxPro Generated Application 
.APP
Generated application or active document (Microsoft Visual FoxPro) 
.APP
Normal mode application file (Centura Team Developer) 
.APP
Symphony Add-in Application 
.APR
ArcView project file 
.APR
Employee Appraiser Performance Review file 
.APR
Lotus Approach 97 View file 
.APS
Advanced patching systems with error checking, (Similar to IPS) 
.APS
Microsoft Visual C++ file 
.APT
Lotus Approach Data view file 
.APT
Text mode application file (Centura Team Developer) 
.APX
Borland C++ Appexpert database 
.APX
Lotus Approach Paradox-Specific information file 
.AQ
Applix data 
.ARC
LH ARC (old version) compressed archive 
.ARC
SQUASH Compressed archive 
.ARF
Automatic Response file 
.ARI
ARI Compressed archive 
.ARI
Aristotle audio file 
.ARJ
Robert Jung ARJ compressed archive (ARJ) 
.ARK
ARC File Archiver CPM/Port archive 
.ARL
AOL v4.0 organizer file 
.ARR
Atari Cubase Arrangement 
.ART
AOL Image file compressed using the Johson-Grace compression algorithm 
.ART
Canon Crayola art 
.ART
Clip Art 
.ART
First Publisher Raster graphic 
.ART
Ray Tracer file 
.ART
Xara Studio drawing 
.ARX
ARX Compressed Archive 
.AS
Applix Spreadsheet 
.ASA
Microsoft Visual InterDev <http://searchDatabase.techtarget.com/sDefinition/0,,sid13_gci213682,00.html> file 
.ASC
ASCII <http://WhatIs.techtarget.com/definition/0,,sid9_gci211600,00.html> text file 
.ASC
PGP <http://searchSecurity.techtarget.com/sDefinition/0,,sid14_gci214292,00.html> armored encrypted <encrypti.htm> file 
.ASD
Astound Presentation 
.ASD
Lotus 1-2-3 Screen driver 
.ASD
Microsoft Advanced Streaming Format (ASF) description file; opens 
.ASD
WinWord AutoSave file 
.ASE
Velvet Studio Sample file 
.ASF
Lotus 1-2-3 Screen font 
.ASF
Microsoft Advanced Streaming Format 
.ASF
Music file (Electronic Arts) 
.ASF
StratGraphics Datafile 
.ASH
TASM 3.0 Assembly language header 
.ASI
Borland C++/Turbo C Assembler Include file 
.ASM
Assembler <http://search390.techtarget.com/sDefinition/0,,sid10_gci211604,00.html> Language source file 
.ASM
Pro/E assembly file 
.ASO
Astound Dynamite Object 
.ASP
<http://searchWin2000.techtarget.com/sDefinition/0,,sid1_gci213787,00.html> Active Server Page (an HTML file containing a Microsoft server-processed script) 
.ASP
Astound Presentation 
.ASP
Procomm Plus setup and connection script 
.AST
Astound multimedia file 
.AST
Claris Works "assistant" file 
.ASV
DataCAD Autosave file 
.ASX
Cheyenne Backup script 
.ASX
Microsoft Advanced Streaming Redirector file 
.ASX
Video file 
.AT2
Aldus Persuasion 2.0 Auto Template 
.ATM
Adobe Type Manager data/info file 
.ATT
AT&T Group 4 bitmap 
.ATW
AnyTime Deluxe for Windows personal information manager file from 
.au
Audio format (original Sun Microsystems generic sound file). 
.AU
Audio U-law (pronounced mu-law) 
.AU
Sun/NeXT/DEC/UNIX sound file 
.AUD
Audio file (Westwood Studios) (Kyrandia 3,C&C,RedAlert,C&C:TS) 
.AUX
ChiWriter Auxilliary Dictionary file 
.AUX
TeX/LaTeX Auxilliary Reference file 
.AVA
Avagio Publication 
.AVB
Inculan Anti-Virus virus infected file 
.AVI
Microsoft Audio Video Interleaved file for Windows movie 
.avi
Video format. 
.AVR
Audio Visual Research file 
.AVS
Application Visualization System file 
.AVS
Stardent AVS-X Image 
.AVX
File Extension (ArcView) 
.AW
Applix Words file 
.AW
HP AdvanceWrite Text file 
.AWD
FaxView Document image 
.awk
awk program source file. 
.AWK
AWK Script/Program 
.AWM
Animation Works Movie 
.AWR
Telsis file for digitally stored audio 
.AWS
StatGraphics Data file 
.AXL
ArcIMS XML project file 
.AXT
ASCII application object template (ZenWorks snAPPshot) 
.AXX
ARJ compressed file from a multi-volume archive (xx = a number from 01 to 99) 
.B
Applause Batch list 
.B&W
1st Reader Mono binary screen image 
.B&W
Atari/Macintosh black and white graphic 
.B1N
1st Reader Mono and color binary screen image 
.B30
ABC Ventura publisher printer font 
.B4
Helix Nuts and Bolts file 
.B8
Raw graphic file (Piclab Plane II) 
.BAD
Oracle bad file 
.BAK
Backup file 
.BAL
Ballade Music score 
.BAR
dBase Application Generator Horizontal menu object 
.BAS
BASIC <http://searchVB.techtarget.com/sDefinition/0,,sid8_gci213805,00.html> source code 
.BAT
Batch file <http://searchWin2000.techtarget.com/sDefinition/0,,sid1_gci211642,00.html> 
.BB
Papyrus Database backup 
.BBL
TeX/BibTeX Bibliographic reference file 
.BBM
Deluxe Paint Bitmap image 
.BBS
Bulletin Board Sytem text 
.BCH
Batch Process Object (dBase Application Generator) 
.BCH
Datalex Entry Point 90 Data file 
.BCM
Microsoft Works Communications file 
.BCO
Bitstream Outline font description file 
.BCP
Borland C++ Makefile 
.BCW
Borland C++ 4.5 Environment settings file 
.BDB
Microsoft Works Dababase file 
.BDF
Egret Datafile 
.BDF
West Point Bridge Designer file 
.BDR
Microsoft Publisher Border 
.BEZ
Bitstream Outline font description 
.BF2
Bradford 2 Font 
.BFC
Windows 95 Briefcase Document 
.BFM
Font Metrics file (Unix/Mainframe) 
.BFX
Fax document file (BitFax) 
.BG
Microsoft Backgammon Game file 
.BGA
OS/2 Graphic array 
.BGI
Borland Graphics Interface Driver 
.BGL
Microsoft Flight Simulator Scenery file 
.BHF
pcAnywhere Host file 
.BI
Binary <http://WhatIs.techtarget.com/definition/0,,sid9_gci211661,00.html> file 
.BIB
Bibliography file (ASCII) 
.bib
bibtex LATEX bibliography source file. 
.BIB
Database 
.BIB
TeX/BibTeX Literature Database 
.BIF
GroupWise initialization file 
.BIF
Image Capture Board Binary Image black & white graphic 
.BIFF
XLITE 3D file 
.BIN
Binary <http://WhatIs.techtarget.com/definition/0,,sid9_gci211661,00.html> file 
.BIO
OS/2 Bios file 
.BIT
X11 Bitmap 
.BK
Backup file (Generic) 
.BK
JetFax Faxbook file 
.BK!
WordPerfect for Windows Document backup 
.BK$
Backup file (Generic) 
.BK1
WordPerfect for Windows Timed backup file for document window 1 
.BK2
WordPerfect for Windows Timed backup file for document window 2 
.BK3
WordPerfect for Windows Timed backup file for document window 3 
.BK4
WordPerfect for Windows Timed backup file for document window 4 
.BK5
WordPerfect for Windows Timed backup file for document window 5 
.BK6
WordPerfect for Windows Timed backup file for document window 6 
.BK7
WordPerfect for Windows Timed backup file for document window 7 
.BK8
WordPerfect for Windows Timed backup file for document window 8 
.BK9
WordPerfect for Windows Timed backup file for document window 9 
.BKP
TurboVidion Dialog Designer Backup 
.BKS
IBM BookManager Read bookshelf file 
.BKS
Microsoft Works Spreadsheet Backup 
.BKW
FontEdit Fontset mirror image 
.BLB
Resource archive (DreamWorks),(Neverhood) 
.BLD
BASIC Bloadable picture file 
.BLK
Alias Wavefront Image 
.BLK
WordPerfect for Windows Temporary file 
.BM
Windows system Bitmap 
.BM1
Apogee BioMenace data 
.BMF
Corel Gallery file 
.BMK
Windows Help bookmark 
.bmp
Microsoft Bitmap file image format. 
.BMP
Windows or OS/2 bitmap 
.BN
Instrument bank file (AdLib) 
.BNK
Instrument Bank file (AdLib) 
.BNK
Sound effects bank file (Electronic Arts) 
.BOL
Compressed archive library file (Microsoft Booasm.arc) 
.BOM
Bill of materials file (Orcad Schematic Capture) 
.BOO
Microsoft Booasm.arc Compressed archive 
.BOOK
Adobe FrameMaker Book 
.BOX
Lotus Notes file 
.BPC
Business Plan Toolkit Chart 
.BPL
Borland Delphi 4 packed library 
.BPS
Microsoft Works Document 
.BPT
CorelDraw Bitmap fills file 
.BPX
Truevision Targa Bitmap 
.BQY
BrioQuery file 
.BR
Bridge Script 
.BRD
Eagle Layout file 
.BRK
Brooktrout Fax-Mail file 
.BRW
Application file associated with financial institution(s) loan applications 
.BRX
A file for browsing an index of multimedia options 
.BRZ
DbBRZ file for very large Db backup or restore 
.BS1
Apogee Blake Stone data file 
.BSA
BSARC Compressed archive 
.BSC
Apple II Compressed archive 
.BSC
Fortran Pwbrmake Object 
.BSC
MS Developer Studio (MSDev) browser information 
.BSP
Quake map file 
.BS_
Microsoft Bookshelf Find Menu shell extension 
.BTM
Batch <http://search390.techtarget.com/sDefinition/0,,sid10_gci211641,00.html> file used by Norton Utilities 
.BTR
Database file (Btrieve 5.1) 
.BUD
Backup disk for Quicken 
.BUG
Bugs and Problems file 
.BUN
CakeWalk Audio Bundle (a MIDI <http://WhatIs.techtarget.com/definition/0,,sid9_gci212572,00.html> program) 
.BUP
Backup 
.BUT
Buttons! Button definition 
.BUY
Movie data file 
.BV1
WordPerfect for Windows Overflow file below insert point in document 1 
.BV2
WordPerfect for Windows Overflow file below insert point in document 2 
.BV3
WordPerfect for Windows Overflow file below insert point in document 3 
.BV4
WordPerfect for Windows Overflow file below insert point in document 4 
.BV5
WordPerfect for Windows Overflow file below insert point in document 5 
.BV6
WordPerfect for Windows Overflow file below insert point in document 6 
.BV7
Wordperfect for Windows Overflow file below insert point in document 7 
.BV8
WordPerfect for Windows Overflow file below insert point in document 8 
.BV9
WordPerfect for Windows Overflow file below insert point in document 9 
.BW
SGI Black and White image file 
.BW
Silicon Graphics Raw red,green and blue bytes file 
.BWB
Visual Baler Spreadsheet application 
.BWR
Kermit Beware buglist 
.BWV
Business Wave file 
.BYU
BYU Movie 
.BZ
Bzip compressed file (Inix) 
.bz
File compressed with the bzip compression algorithm/program. These files are mostly redundant now. The vast majority of files are compressed using the superior bzip2 program. 
.BZ2
Bzip compressed file (Unix) (replaces Bz) 
.bz2
File compressed with the bzip2 compression program. 
.B_W
Atari/Macintosh black and white graphic 
.C
C code 
.c
C program source code. 
.C
Site configuration for Secure Remote (CheckPoint VPN) 
.C--
Sphinx C-- Source code 
.C00
Ventura Publisher Print file 
.C01
Typhoon wave 
.C86
Computer Innovation (C86) Source code 
.CA
Telnet Server Initial cache data file 
.CAB
Microsoft cabinet file (program files compressed for software distribution) 
.CAC
dBase IV Executable file 
.CAD
Softdesk Drafix Cad file 
.CAG
Catalog file (Microsoft Clip Gallery v. 2.x,3.x,4.x) 
.CAL
Calendar schedule data file 
.CAL
CALS Compressed Bitmap 
.CAL
SuperCalc 4/5 Spreadsheet 
.CAM
Casio camera file 
.CAN
Navigator Fax 
.CAP
Compressed music file 
.CAP
Telix Session Capture file 
.CAP
Ventura Publisher Caption 
.CAR
AtHome assistant file 
.CAS
Comma-delimited ASCII file 
.CAT
dBase Catalogue file 
.CAT
Quicken IntelliCharge categorization file 
.CB
Microsoft clean boot <http://searchWin2000.techtarget.com/sDefinition/0,,sid1_gci211696,00.html> file 
.CBC
CubiCalc Fuzzy Logic System file 
.CBI
Column binary file (used in IBM mainframe systems) 
.CBL
Cobol Source code 
.CBM
XLib Compiled Bitmap 
.CBT
Generic Computer based training file 
.CC
C++ Source code 
.CC
Visual dBASE custom class file 
.cc, .cxx, .C, .cpp
C++ program source code. 
.CCA
cc:mail archive file 
.CCB
Visual Basic Animated Button configuration file 
.CCC
Curtain Call Native bitmap graphic 
.CCE
Data file (Calendar Creator Plus) 
.CCF
Multimedia Viewer configuration file used in OS/2 
.CCF
Symphony Communications Configuration file 
.CCH
Corel Chart 
.CCL
Intalk Communication Command Language 
.CCM
Lotus CC:Mail "box" file (for example, INBOX.CCM) 
.CCO
CyberChat data file 
.CCO
XBTX Graphics 
.CCT
Macromedia Director Shockwave cast file 
.CDA
CD Audio Track 
.CDB
CardScan Database (CardScan) 
.CDB
Clipboard file 
.CDB
Conceptual model backup file (PowerDesigner) 
.CDB
TCU Turbo C Utilities Main database 
.CDF
<http://searchWebServices.techtarget.com/sDefinition/0,,sid26_gci213841,00.html> Microsoft Channel Definition Format 
.CDF
Netcdf Graphic file 
.CDFS
Compact Disk filing system (WindRiver) 
.CDI
Phillips Compact Disk Interactive file 
.CDK
Atari Calamus Document 
.CDM
Conceptual data model file (PowerDesigner Data Architect) (Sybase) 
.CDM
Conceptual model file (PowerDesigner) 
.CDM
Visual dBASE custom data module 
.CDR
Corel Draw Vector drawing file 
.CDR
Raw Audio-CD data file 
.CDT
Corel Draw template 
.CDT
CorelDraw Data file 
.CDX
Corel Draw compressed drawing 
.CDX
Microsoft's Visual Foxpro <http://searchDatabase.techtarget.com/sDefinition/0,,sid13_gci213705,00.html> index 
.CE
The FarSide Computer Calendar Main CE file 
.CEG
Tempra Show Bitmap graphic 
.CEL
AutoDesk Animator Cel Image 
.CEL
CIMFast Event Language file 
.CER
Certificate file (MIME x-x509-ca-cert) 
.CF
Imake Configurtion file 
.cf, .cfg
Configuration file or script. 
.CFB
Comptons Multimedia file 
.CFG
Configuration file 
.CFL
CorelFLOW Chart 
.CFM
ColdFusion <http://searchDatabase.techtarget.com/sDefinition/0,,sid13_gci211812,00.html> template 
.CFM
Corel FontMaster file 
.CFM
Creative FM-Music 
.CFM
Visual dBASE Windows customer form 
.CFN
Atari Calamus Font data file 
.CFO
TCU Turbo C Utilities C form object 
.CFP
The Complete Fax Portable fax file 
.CGA
Ventura Publisher Display font file 
.CGI
<http://searchDatabase.techtarget.com/sDefinition/0,,sid13_gci213846,00.html> Common gateway interface script 
.cgi
Executable script that produces web page output. 
.CGM
Computer Graphic Metafile 
.CH
Clipper 5 Header 
.CH
OS/2 configuration file 
.CH3
Harvard Graphics 3.0 Chart 
.CH4
Charisma 4.0 Presentation 
.CHD
FontChameleon Font descriptor 
.CHF
pcAnywhere remote control file 
.CHI
ChiWriter Document 
.CHK
File fragments saved by Windows Disk Defragmenter or ScanDisk 
.CHK
WordPerfect for Windows Temporary file 
.CHL
Configuration History Log 
.CHM
Compiled HTML file 
.CHN
Ethnograph Data file 
.CHP
Ventura Publisher Chapter file 
.CHR
Character Sets (Font file) 
.CHT
ChartMaster dBase Interface file 
.CHT
ChartViewer file 
.CHT
Harvard Graphics Vector <http://WhatIs.techtarget.com/definition/0,,sid9_gci528553,00.html> file 
.CIF
CalTech Intermediate Graphic 
.CIF
Easy CD Creator image 
.CIF
pcAnywhere caller file 
.CIL
Clip Gallery download package file 
.CIM
Sim City 2000 file 
.CIN
OS/2 change control file that tracks changes to an INI file 
.CIX
TCU Turbo C Utilities Database Index 
.CK1
iD/Apogee Commander Keen 1 data 
.CK2
iD/Apogee Commander Keen 2 data 
.CK3
iD/Apogee Commander Keen 3 data 
.CK4
iD/Apogee Commander Keen 4 data 
.CK5
iD/Apogee Commander Keen 5 data 
.CK6
iD/Apogee Commander Keen 6 data 
.CKB
Borland C++ Keyboard mapping file 
.CL
Generic LISP Source code 
.CL3
Layout file (Adaptec Easy CD Creator) 
.CLASS
Java class 
.CLG
Disk Catalog database 
.CLL
Cricket Software Clicker File 
.CLO
Cloe Image 
.CLP
Clipper 5 Compiler Script 
.CLP
Quattro Pro Clip art 
.CLP
Windows Clipboard 
.CLR
1st Reader Binary color screen image 
.CLR
PhotStyler Color defintion 
.CLS
C++ Class Definition 
.CLS
Visual Basic Class Module 
.CM
Craftman Data 
.CMA
Database file in plain text format (APPLIX TM1) 
.CMD
1st Reader External Command Menu 
.CMD
Command file for Windows NT (similar to a DOS .BAT file), OS/2 
.CMD
dBase-II program file 
.CMD
DOS CP/M command file 
.CMF
Corel Metafile 
.CMG
Chessmaster saved game 
.CMK
Card Shop Plus file 
.CMM
CEnvi Batch file 
.CMP
Address document 
.CMP
CorelDRAW 4.0 Postscript Printer Header 
.CMP
JPEG <http://searchWebServices.techtarget.com/sDefinition/0,,sid26_gci212425,00.html> Bitmap 
.CMP
Microsoft Word for DOS User dictionary 
.CMP
Route 66 Address Document 
.CMR
MediaPlayer Movie 
.CMV
Corel Move animation 
.CMX
Corel Presentation Exchange image 
.CMYK
Raw cyan, magenta, yellow, and black bytes file 
.CNC
CNC General Program data 
.CNF
Configuration file used by Telnet, Windows, and other applications with varying internal formats 
.CNM
Windows application menu options and setup file 
.CNQ
Compuworks Design Shop file 
.CNT
Windows (or other) system content files for the help index and other purposes 
.CNV
Conversion files (WS_FTP Pro) files that will be converted from (Example) "HTML-"HTM" for upload 
.CNV
Word for Windows Data conversion support file 
.CNV
WordPerfect for Windows Temporary file 
.COB
COBOL Source code 
.COB
trueSpace 2 object 
.COD
dBase Application Generator Template source file 
.COD
FORTRAN Compiled code 
.COD
Microsoft C compiler output as displayable machine language/assembler with original C as comments 
.COD
Video Text file 
.COL
AutoDesk Animator Color Palette 
.COL
Microsoft Multiplan Spreadsheet 
.COM
Command file (program) 
.Compiler
attempts to compile the source files of a Help system 
.CON
Simdir Configuration file 
.conf, .config
Configuration file. 
.CP8
CP8 256 Gray Scale image 
.CPD
Complaints Desk Script 
.CPD
Corel PrintOffice file (drawing) 
.CPD
Fax Cover document 
.CPE
Fax Cover document 
.CPF
The Complete Fax (Fax file) 
.CPH
Image file (Corel Print House) see CPO 
.CPI
ColorLab Processed Image bitmap 
.CPI
Microsoft MS-DOS code page information 
.CPJ
CeQuadrant CD Project 
.CPL
Compel Presentation 
.CPL
Control Panel Module 
.CPL
Corel color palette 
.CPO
Image file (Corel Print Office) 
.CPP
C++ Source code 
.CPP
CA-Cricket Presents presentation 
.CPR
Corel Presents presentation 
.CPS
Central Point PC Tools Backup 
.CPS
Coloured postscript 
.CPT
CA-Cricket Presents Template 
.CPT
Corel Photo-Paint image 
.CPT
dBase Encrypted Memo 
.CPT
Macintosh Compressed Archive 
.CPX
Corel Presentation Exchange compressed drawing 
.CPY
Data file (Copy Books) 
.CPZ
COMPOZ Music Text 
.CRC
Check file (Win-SFV32) (Fantasia Software) 
.CRC
Circular reference file (Pro/Engineer) 
.CRD
Microsoft Windows 3.x Cardfile 
.CRF
Zortech C++ cross-reference 
.CRH
Image file (Microsoft Golf) 
.CRP
Corel Presents run-time presentation 
.CRP
dBase IV Encrypted database 
.CRP
Visual dBASE custom report 
.CRS
WordPerfect 5.1 for Windows File Conversion resource 
.CRT
Certificate file 
.CRT
Crontab file) 
.CRT
Oracle Terminal settings information 
.CRU
CRUSH Compressed archive 
.CSA
Comma deliminated text 
.CSC
Corel script 
.CSG
Statistica/w Graph file 
.CSH
C shell script files (Hamilton Labs) 
.csh
csh shell script. 
.CSM
Borland C++ 4.5 Precompiled header 
.CSM
Script file (Kodak Dc265 Camera) 
.CSO
Customer service data and outcome file 
.CSP
PC Emcee On-Screen image 
.CSS
<http://searchWebServices.techtarget.com/sDefinition/0,,sid26_gci211749,00.html> Cascading Style Sheet (MIME) 
.CSS
Statistica/w Datasheet 
.CSS
Stats+ Datafile 
.CST
Macromedia Director "Cast" (resource) file 
.CSV
Comma-separated values file 
.CSV
CompuShow Adjusted EGA/VGA Palette 
.CT
A graphic file associated with the Paint Shop Pro Graphic Editor 
.CT
Scitex CT bitmap 
.CTC
PC Installer Control 
.CTF
Symphony Character code translation 
.CTL
dBase IV Control 
.CTL
Used in general for files containing control information. FAXWorks uses it to keep information about each fax sent and received. 
.CTX
Microsoft Online Course Text 
.CTX
Pretty Good Privacy (PGP) Ciphertext file 
.CTX
Visual Basic User control binary file 
.CUE
Microsoft Cue Cards data 
.CUL
Cursor library file (IconForge) 
.CUR
Windows Cursor 
.CURSOR
Sun Microsystems Cursor 
.CUT
Dr Halo Bitmap 
.CV
Corel Versions archive 
.CV
Microsoft CodeView information screen 
.CVG
Image 
.CVS
Canvas drawing file 
.CWK
Claris Works data 
.CWS
Claris Works template 
.CXT
Macromedia Director protected (not editable) "Cast" (resource) file 
.CXX
C++ source code 
.D2D
2D/3D object file (3-D Fassade Plus) 
.D64
Commodore 64 emulator disk image 
.DAO
Windows Registry Backup 
.DAP
Data access page (Microsoft Access 2000) 
.DAT
A data file extension used to designate an error message in a 
.DAT
Data file 
.DAT
Extension used for some MPEG <http://WhatIs.techtarget.com/definition/0,,sid9_gci212601,00.html> files 
.DAT
WordPerfect Merge Data 
.DB
Borderland's Paradox 7 table database 
.db
Database file. 
.DBC
Microsoft's Visual FoxPro <http://searchDatabase.techtarget.com/sDefinition/0,,sid13_gci213705,00.html> database container file 
.DBF
A dBASE file, a format originated by Ashton-Tate, but understood by Act!, Clipper,FoxPro, Arago, Wordtech, xBase, and similar database or database-related products. 
.DBF
Enable database (can be opened with Excel 97) 
.DBF
Oracle 8.1.x tablespace file 
.DBK
dBase Database Backup 
.DBK
Schematic backup file (Orcad Schematic Capture) 
.DBO
Compiled program file (dBase IV) 
.DBQ
Paradox Memo 
.DBT
dBase Text Memo 
.DBV
Memo field file (Flexfile 2) 
.DBW
Microsoft Windows 9.x Database file (DataBoss) 
.DBX
DataBeam image 
.DBX
Microsoft's Visual FoxPro <http://searchDatabase.techtarget.com/sDefinition/0,,sid13_gci213705,00.html> Table file 
.DC
CAD file (DesignCAD) 
.DC2
CAD file (DesignCAD) 
.DC5
DataCAD Drawing 
.DCA
Document Content Architecture Text file (IBM DisplayWrite) 
.DCA
Visual Basic Active designer cache 
.DCF
Data file (Dyadic) 
.DCF
Disk Image file 
.DCIM
Digital Imaging and Communications in Medicine (image and data) 
.DCM
DCM module 
.DCP
Data CodePage (OS/2) 
.DCR
Shockwave file 
.DCS
Bitmap Graphics (Quark XPress) 
.DCS
Datafile (ACT! Activity file) 
.DCS
Desktop Color Separation file 
.DCT
Database Dictionary file (Clarion Database Developer) 
.DCT
Database SpellCheck Dictionary (Harvard Graphics 3.0-Symphony) 
.DCT
Microsoft's Visual FoxPro <http://searchDatabase.techtarget.com/sDefinition/0,,sid13_gci213705,00.html> database container file 
.DCU
Delphi compiled unit 
.DCX
Bitmap Graphics file (Multipage PCX) 
.DCX
Fax image (based on PCX) 
.DCX
Macro file 
.DCX
Microsoft's Visual FoxPro <http://searchDatabase.techtarget.com/sDefinition/0,,sid13_gci213705,00.html> database container file 
.DD
Compressed Archive (Macintosh DISKDOUBLER) 
.DDB
Bitmap Graphics file 
.DDF
Btrieve or Xtrieve Data Definition File, which contains metadata <http://searchDatabase.techtarget.com/sDefinition/0,,sid13_gci212555,00.html> describing a Btrieve or Xtrieve file 
.DDI
Image File (DISKDUPE) 
.DDIF
Digital Equipment or Compaq file. Used for storing images and their 
.DDP
Device Driver Profile (OS/2) 
.deb
Debian package for the Debian distribution. 
.DEB
Debug Script (DOS Debug) 
.DEF
Assembly Header file (Geoworks) 
.DEF
C++ definition file 
.DEF
Define Module file (3-D Fassade Plus) 
.DEF
SmartWare II data 
.DEFI
Oracle 7 de-install script 
.DEM
A file with USGS standards for Digital Elevation Models (Vista Pro) 
.DEM
Demo file (Descent) 
.DEM
Graphics file (Vista Pro) 
.DEP
Visual Basic Setup Wizard Dependency file 
.DER
Certificate file 
.DEV
Device Driver 
.DEWF
Macintosh SoundCap/SoundEdit recorded instrument file 
.DEZ
Encrypted zip file (DES Encryption) 
.DFD
Data Flow Diagram Graphic (Prosa) 
.DFI
Outline Font description (Digifont) 
.DFL
Default Program Settings (Signature) 
.DFM
Data Flow Diagram model (Prosa) 
.DFS
Sound File (Delight) 
.DFV
Printing Form value (Microsoft Word) 
.DGN
Microstation95 CAD drawing 
.DGS
Diagnostics Report 
.DH
Dependency Information file (Geoworks) 
.DHP
Graphic file (Dr. Halo II-III PIC Format) 
.DHT
Datafile (Gauss) 
.DIA
Diagraph Graphics file (Computer Support Corporation) 
.DIB
Device-independent bitmap 
.DIC
Dictionary file (Lotus Notes, Domino) 
.DIC
Dictionary file 
.DICM
Digital imaging and communications in medicine file (DICOM) 
.DIF
Data Interchange Format spreadsheet 
.DIF
Data Interchange Output file 
.DIF
Database file (VisiCalc) 
.DIF
Text file (Output from Data Interchange Format) 
.diff
Output of the diff program indicating the difference between files or source trees. 
.DIG
Digilink file 
.DIG
Sound Designer I audio 
.DIP
Graphics file 
.DIR
Dialing Directory (ProComm Plus) 
.DIR
Directory (VAX) (DEC) 
.DIR
Macromedia Director file 
.DIR
Movie (MacroMind Director 4.x) 
.dir
X Window System font/other database directory. 
.DIS
Distribution file (VAX Mail) 
.DIS
Ray Tracer file 
.DIS
Thesaurus file (CorelDraw) 
.DIZ
Description file (Description in ZIP) 
.DKB
Graphics file (Ray Traced DKBTrace) 
.DL
Image 
.DLD
Datafile (Lotus 1-2-3) 
.DLG
C++ Dialogue Script 
.DLL
<http://searchWin2000.techtarget.com/sDefinition/0,,sid1_gci213902,00.html> Dynamic-link library file 
.DLL
Export/Import Filter (CorelDraw) 
.DLS
Downloadable sound 
.DLS
Interactive music architecture (IMA)(Microsoft),(Blood2) 
.DLS
Setup file (Norton DiskLock) 
.DMD
Visual dBASE data module 
.DMF
Packed Amiga disk image 
.DMF
X-Trakker music module (MOD) 
.DMO
Demo file (Derive) 
.DMP
Dump file (Screen or Memory) 
.DMS
Compressed Archive (Amiga DISKMASHER) 
.DOB
Visual Basic User document 
.DOC
DisplayWrite document 
.DOC
Document format (Interleaf) 
.DOC
FrameMaker or FrameBuilder document 
.DOC
Microsoft Word document 
.DOC
WordPerfect document 
.DOC
WordStar document 
.DOG
Screen Saver file (Laughing Dog Screen Saver) 
.DOH
Dependency Information file (Geoworks) 
.DOS
External Command file (1st Reader) 
.DOS
Network Driver file (PKT_DIS.dos) 
.DOS
Text file (DOS) 
.DOT
Line-Type definition (CorelDraw) 
.DOT
Word Document Template (Microsoft Word for Windows) 
.DOX
Text file (MultiMate 4.x) 
.DOX
User document binary form (Visual Basic) 
.DOZ
Description out of Zip (VENDINFO) 
.DP
Calendar file (Daily Planner) 
.DP
Datafile (DataPhile) 
.DPL
Borland Delphi 3 packed library 
.DPR
Project header (Borland C++) 
.DPT
Publication file (Publish-It!) 
.DR9
Directory file 
.DRAW
Acorn's object-based vector image 
.DRC
Design rules check report file (Orcad Schematic Capture) 
.DRS
Display Resource file (WordPerfect for Windows) 
.DRV
Device Driver (Required to make a device function) 
.DRV
Driver <http://searchStorage.techtarget.com/sDefinition/0,,sid5_gci212002,00.html> 
.DRW
Lotus Freelance Image 
.DRW
Pro/E drawing 
.DRW
Vector graphics (Micrografx) 
.DS4
Micrografx Designer Image 
.DS4
Vector Graphics (Micrografx) 
.DSC
Discard file (Oracle) 
.DSD
Database file (DataShaper) 
.DSF
Micrografx Designer v7.x file 
.DSG
DooM saved game 
.DSK
Driver file (Novell Netware) 
.DSK
Project Desktop file (Borland C++/Turbo Pascal) 
.DSM
Digital Sound Module (DSI) 
.DSM
Dynamic Studio music module (MOD) 
.DSM
Music module file (DSIK) 
.DSN
Design (Object System Designer) 
.DSN
ODBC Data source 
.DSN
Schematic file (Orcad Schematic Capture) 
.DSP
Display parameters (Signature) 
.DSP
Graphics Display driver (Dr. Halo) 
.DSP
Microsoft Developer Studio project 
.DSQ
Corel QUERY 
.DSR
Driver Resource (WordPerfect for Windows) 
.DSR
Visual Basic Active designer file 
.DSS
Digital Sound file (Digital Soup)) 
.DSS
Screensaver file (DCC) 
.DST
Distribution file (PC-RDist, by Pyzzo) 
.DST
Embroidery machines graphic file 
.DSW
Desktop settings (Borland C++ 4.5) 
.DSW
Microsoft Developer Studio workspace file 
.DSX
Visual Basic Active designer binary file 
.DTA
Datafile (Turbo C++) 
.DTA
World Bank's STARS data 
.DTD
<http://searchWebServices.techtarget.com/sDefinition/0,,sid26_gci213918,00.html> SGML Document Type Definition (DTD <http://searchWebServices.techtarget.com/sDefinition/0,,sid26_gci213918,00.html>) file 
.DTED
Digital terrain elevation data (geographic data format) 
.DTF
Database file (PFS-Questions & Answers) 
.DTF
Symantec Q&A relational database 
.DTM
Module file (DigiTrakker) 
.DTP
Desktop layout file (SecurDesk!/SecurDesk! LV) 
.DTP
Template file (Pressworks) 
.DTP
Text Document (Timeworks Publisher 3.x) 
.DT_
Data file fork (Macintosh) 
.DUN
Microsoft Dial-up Networking Export file 
.DUP
Duplicate Backup 
.DV
Digital video (MIME) 
.DVC
Datafile (Lotus 1-2-3) 
.DVF
Graphics file associated with camcorders (DV Studio) 
.DVI
Binary file (TeX) 
.DVI
Device Independent Document (TeX) (LaTeX) 
.dvi
Device-independent file. Formatted output of .tex LATEX file. 
.DVP
Desqview Program information (DESQview) 
.DVP
Device parameter file (AutoCAD) 
.DW2
Drawing file (DesignCAD for Windows) 
.DWC
Compressed Archive (DWC) 
.DWD
DiamondWare digitized file 
.DWF
Drawing Web file (Microsoft WHIP autoCAD reader) 
.DWF
Vector graphic (Autodesk) 
.DWG
AutoCAD Drawing 
.DWG
AutoCAD drawing, or older Generic CAD drawing file 
.DWP
Document file (DeScribe) 
.DWS
Workspace file (Dyadic) 
.DX
Digital Electric Corporation (DEC) Data exchange file 
.DXF
Data Exchange File 
.DXF
Drawing Interchange (eXchange) format,a text representation of the binary DWG format 
.DXF
Drawing Interchange Format (AutoCAD) 
.DXN
Fax document (Fujitsu dexNet) 
.DXR
Macromedia Director protected (not editable) movie file 
.DYN
Datafile (Lotus 1-2-3) 
.E00
Coverage export file (ArcInfo) 
.e00
Exchange file (Arc/Info) 
.EBJ
Error Checking Object file (Geoworks) 
.ED5
EDMICS image 
.ED6
EDMICS image 
.EDA
Ensoniq ASR disk image 
.EDB
ROOTS3 Geneological data file 
.EDD
Element Definition document (FrameMaker+SGML documents) 
.EDE
Ensoniq EPS disk image 
.EDK
Ensoniq KT disk image 
.EDQ
Ensoniq SQ1/SQ2/KS32 disk image 
.EDS
Ensoniq SQ80 disk image 
.EDT
Default settings (VAX Edt editor) 
.EDV
Ensoniq VFX-SD disk image 
.EEB
Button Bar for Equation editor (WordPerfect for Windows) 
.EFA
Ensoniq ASR file 
.EFE
Ensoniq EPS file 
.EFK
Ensoniq KT file 
.EFQ
Ensoniq SQ1/SQ2/KS32 file 
.EFS
Ensoniq SQ80 file 
.EFT
High Resolution Screen Font (ChiWriter) 
.EFV
Ensoniq VFX-SD file 
.EFX
Fax document (Efax Reader) 
.EFX
Fax Document (Everex EFax) 
.EGA
EGA Display font (Ventura Publisher) 
.el
Lisp program source. 
.EL
Lisp Source code (eMacs) 
.ELC
eMac Lisp Source code (byte-compiled) 
.ELM
Theme-Pack file for (Microsoft FrontPage) 
.ELT
Event List Text file (Prosa) 
.EMB
Embedded bank File (Everest) 
.EMD
ABT Extended MoDule 
.EMF
Enhanced Windows Metafile 
.EML
Microsoft Outlook Express mail message (MIME RFC 822) 
.EMS
Enhanced Menu System Configuration file (PC Tools) 
.EMU
Terminal Emulation Data file (BITCOM) 
.ENC
Encoded file (UUENCODEd File, Lotus 1-2-3) 
.ENC
Music file (Encore) 
.ENC
Video file 
.END
Arrow-Head Definition Table (CorelDraw) 
.ENFF
Neutral Format 
.ENG
Chart Graphics file (EnerGraphics) 
.ENG
Dictionary Engine file (Sprint) 
.ENV
Enveloper Macro (WOPR) 
.ENV
Environment file (WordPerfect for Windows) 
.EPD
Publication file (Express Publisher) 
.EPHTML
Enhanced Perl-parsed HTML 
.EPI
Document file (Express Publisher) 
.EPS
Encapsulated Postscript image file 
.EPS
Encapsulated Postscript Vector graphics (Adobe Illustrator) 
.EPS
Printer font (Epson, Xerox, Ventura Publisher) 
.EPS2
Adobe Level II Encapsulated Postscript 
.EPSF
Encapsulated PostScript 
.EPSI
Adobe Encapsulated Postscript Interchange 
.EQN
Equation file (WordPerfect for Windows) 
.ER1
ERWin file 
.ERD
Entity Relationship Diagram graphic file (Prosa) 
.ERM
Entity Relationship Diagram Model file (Prosa) 
.ERR
Compilation error file (Microsoft Visual FoxPro) 
.ERR
Stores the error messages that result when the RoboHELP Help 
.ERX
ERWin file 
.ESH
Extended Shell Batch file (DOS) 
.ESL
Distributable support library file (Microsoft Visual FoxPro) 
.ESPS
ESPS audio file 
.ETH
Document file (Ethnograph 3.x) 
.ETX
Structure Enhanced text (SetText) 
.EUI
Ensoniq ESP family compacted disk image 
.EVT
Event Log (Microsoft Windows NT, 2000) 
.EVY
Document (WordPerfect for Windows Envoy) 
.EWD
Text Document (Express Publisher for Windows) 
.EWL
Microsoft Encarta document 
.EX3
Device Driver file (Harvard Graphics 3.x) 
.EXC
Exclude file for Optimize (do not process, QEMM) 
.EXC
Microsoft Word Exclusion Dictionary file 
.EXC
Source Code file (Rexx VM/CMS) 
.EXE
Executable <http://WhatIs.techtarget.com/definition/0,,sid9_gci212086,00.html> file (program) 
.EXP
Saved chat (ICQ) 
.EXT
ASCII binary transfer file (WS_FTP PRO) (IPSWITCH Software) 
.EXT2
Second extended file system (Linux) 
.EXT3
Third extended file system (Linux) 
.EZP
Compressed file (Edify.zip) (Edify Electronic Workforce Backup Utility) 
.F
Compressed file archive (FREEZE) 
.F
FORTRAN file 
.F01
Fax document (Perfect Fax) 
.F06
Dos screen text font (height= 6 pixels) 
.F07
Dos screen text font (height= 7 pixels) 
.F08
Dos screen text font (height= 8 pixels) 
.F09
Dos screen text font (height= 9 pixels) 
.F10
Dos screen text font (height= 10 pixels) 
.F11
Dos screen text font (height= 11 pixels) 
.F12
Dos screen text font (height= 12 pixels) 
.F13
Dos screen text font (height= 13 pixels) 
.F14
Dos screen text font (height= 14 pixels) 
.F15
Dos screen text font (height= 15 pixels) 
.F16
Dos screen text font (height= 16 pixels) 
.F2R
Linear music module (Farandole) 
.F3R
Blocked music module (Farandole) 
.F77
Source code file (FORTRAN 77) 
.F90
FORTRAN file 
.F96
Fax document (Frecom FAX96) 
.FAC
Face graphic 
.FAQ
Frequently Asked Questions document 
.FAR
Music module (MOD) (Farandole Composer) 
.FAS
Basic module file (3-D Fassade Plus) 
.FAV
Navigation bar (Microsoft Outlook) 
.FAX
<http://searchNetworking.techtarget.com/sDefinition/0,,sid7_gci212098,00.html> 
.FAX
Type image 
.FBK
Backup (Navison Financials) 
.FC
Spell Check dictionary file (Harvard Graphics) 
.FCD
Virtual CD-ROM file 
.FCM
Binary file patch (Forward Compression) 
.FD
Declaration file (FORTRAN) 
.FD
Field offsets for compiler (DataFlex) 
.FDB
Database (Navison Financials) 
.FDF
Forms Document (Adobe Acrobat) 
.FDW
Document form (F3 Design and Mapping) 
.FEB
Button Bar for Figure Editor (WordPerfect for Windows) 
.FEM
CADRE Finite Element Mesh 
.FF
Outline Font description (AGFA CompuGraphics) 
.FFA
MS find fast file 
.FFF
Fax document (defFax) 
.FFF
GUS PnP bank file 
.FFL
Image file (PrintMaster Gold) 
.FFL
MS fast find file 
.FFO
MS fast find file 
.FFT
Final Form Text (part of IBM's DCA) 
.FFX
MS fast find file 
.FH3
Aldus Freehand 3 drawing (Vector graphic) 
.FH4
Aldus Freehand 4 drawing (Vector graphic) 
.FI
File Interface (FORTRAN) 
.FIF
Fractal <http://WhatIs.techtarget.com/definition/0,,sid9_gci212149,00.html> Image 
.FIG
REND386/AVRIL file 
.FIL
File List Object (dBase Application Generator) 
.FIL
File template (Application Generator) 
.FIL
Overlay (WordPerfect for Windows) 
.FIN
Print formatted text (Perfect Writer) 
.FIT
File index table (Microsoft Windows NT) 
.FIT
Graphic (FITS) 
.FITS
CCD camera image 
.FITS
Flexible Image Transport System file 
.FIX
Patch file (Generic) 
.FKY
Macro (Microsoft FoxPro) 
.FLA
Movie (Macromedia Flash) 
.FLB
Format library (Papyrus) 
.FLC
FLIC animation (AutoDesk) 
.FLD
Field define module file (3-D Fassade Plus) 
.FLD
File folder (Charisma) 
.FLF
Delived form (Corel Paradox) 
.FLF
Driver (OS/2) 
.FLF
License (Navison Financials) 
.FLI
FLIC animation (AutoDesk) 
.FLI
Font library (EmTeX) 
.FLL
Distributable dynamic link library (DLL) (Microsoft Visual FoxPro) 
.FLM
Film Roll (AutoCAD) 
.FLO
FlowCharter file (MicroGrafx) 
.FLS
Filelist document (Farrukh Imposition Publisher) 
.FLT
Filter (Corel) 
.FLT
Filter (Micrografx Picture Publisher) 
.FLT
Graphics filter (Microsoft) 
.FLT
Graphics filter support file (Asymetrix ToolBook) 
.FLT
Music module (MOD) (StarTrekker) 
.FLT
Open Flight file (MulitGen) 
.FLX
Compiled binary file (DataFlex) 
.FM
FrameMaker Document (Adobe) 
.FM
Spreadsheet (FileMaker Pro) 
.FM1
Spreadsheet (Lotus 1-2-3, version 2.x) 
.FM3
Device driver (Harvard Graphics, version 3.0) 
.FM3
Spreadsheet (Lotus 1-2-3, version 3.x) 
.FMB
Binary source code for form, (Oracle, v4.x and later) 
.FMB
File Manager button bar (WordPerfect for Windows) 
.FMF
Font or Icon (IBM LinkWay) 
.FMK
MakeFile (FORTRAN PowerStation) 
.FML
Mirror list (Oracle) 
.FMO
Compiled format (dBase IV) 
.FMP
Document file (FileMaker Pro) 
.FMT
Csreen format file (Microsoft Visual FoxPro) 
.FMT
Print file (Microsoft Schedule+) 
.FMT
Style sheet (Sprint) 
.FMT
Text format for form file (Oracle, v4.x and later) 
.FMX
Executable form, (Oracle,v4.x and later) 
.FN3
Font (Harvard Graphics) 
.FND
Saved Search (Find applet) (Microsoft Explorer) 
.FNG
Font group (Font Navigator) 
.FNK
Module (FunkTracker) 
.FNT
Font (Generic) 
.FNX
Inactive font (Exact) 
.FO1
Font (Borland Turbo C) 
.FO2
Font (Borland Turbo C) 
.FOG
Fontographer font 
.FOL
Saved message folder (1st Reader) 
.FON
Call log (Procomm Plus) 
.FON
Dialing directory (Telix) 
.FON
Font (Generic) 
.FON
System font (Generic) 
.FOR
Form (WindowBase) 
.FOR
FORTRAN source code 
.forward
On UNIX, a user can place an e-mail address in his ".forward" file. This will cause all e-mail sent to his account to be forwarded to that e-mail address. This file a is prime target of attackers. If they can overwrite this file, they can subtly start capturing the user's e-mail. This is especially dangerous if the the account in question is the root account. Note that the user doesn't have to know any about this file or have one on his system. The mere creation of this file by the intruder will activate this feature. Furthermore, since this file starts with a 'dot', it is normally hidden from the user, so they won't even be ware that this feature exists. 
.FOT
Font-related file (Generic) 
.FOT
Installed TrueType font (Microsoft Windows Font Installer) 
.FP
Configuration file (FoxPro) 
.FP
FileMaker Pro file 
.FP1
"Flying Pigs" screensaver datafile (Microsoft Windows 9.x) 
.FP3
FileMaker Pro v.3 & 4 document file 
.FP5
Document file (FileMaker Pro v.5) 
.FPC
Catalog file (FoxPro) 
.FPT
FileMaker Pro file 
.FPT
Memo fields (Microsoft FoxPro) 
.FPW
Floorplan drawing (FloorPlan Plus for Windows) 
.FPX
Bitmap (FlashPix) 
.FR3
Renamed dBaseIII+ form (dBase IV) 
.FRF
Font (FontMonger) 
.FRG
Uncompiled report (dBase IV) 
.FRK
Zip (compressed ) file (Macintosh) 
.FRM
Document (FrameMaker or FrameBuilder) 
.FRM
Executable file (Oracle,v3.0 and earlier) 
.FRM
Form (Generic) 
.FRM
Form (Visual Basic) 
.FRM
Merge form (WordPerfect for Windows) 
.FRM
Symbol Report (DataCAD) 
.FRO
Compiled report (dBase IV) 
.FRP
Form (PerForm PRO Plus) 
.FRS
Screen Font Resource (WordPerfect for Windows) 
.FRT
Report menu (FoxPro) 
.FRX
Form stash file (Visual Basic) 
.FRX
Report (Microsoft FoxPro) 
.FSF
fPrint Audit Tool 
.FSL
Form (Paradox for Windows) 
.FSL
Paradox 7 form (Borderland) 
.FSL
Saved form (Corel Paradox) 
.FSM
Sample file (Farandoyle) 
.FST
Linkable program (dBFast) 
.FSX
Data (Lotus 1-2-3) 
.FT
Full text index (Lotus Notes) 
.FTB
Index file (Roots3) 
.FTF
Client access data specification file (AS/400) (Client to Server) 
.FTG
Help system full-text search group file (Microsoft Windows) 
.FTM
Font (MicroGrafx) 
.FTP
File transfer protocol (Internet Generic) 
.FTS
Help system full-text search index (Windows) 
.FTW
Document file (Family Tree Maker) 
.FW
Database (Framework II) 
.FW2
Database (Framework II) 
.FW3
Database (Framework III) 
.FW4
Database (Framework IV) 
.FWB
Data file backup for file splitting configuration (FileWrangler) 
.FWS
Data file for file splitting configuration (FileWrangler) 
.FX
On-Line guide (FastLynx) 
.FXD
Phonebook (FAXit) 
.FXP
Compiled source code (FoxPro) 
.FXS
Fax Transmit graphic (WinFax) 
.FZB
Bank dump file (Casio FZ-1) 
.FZF
Full dump file (Casio FZ-1) 
.FZV
Voice dump file (Casio FZ-1) 
.G
Data chart (APPLAUSE) 
.g3
G3 fax format image file. 
.G721
Raw CCITT G.721 //$bit ADPCM data 
.G723
Raw CCITT G.723 3 or 5bit ADPCM data 
.G8
Raw Graphics (one byte per pixel) Plane III (PicLab) 
.GAL
Album (Corel Multimedia Manager) 
.GAM
Fax document (GammaFax) 
.GB
Emulator ROM image file (Nintendo GameBoy) 
.GBC
Color emulator ROM image file (Nintendo GameBoy) 
.GBL
Global definitions (VAXTPU Editor) 
.GC1
Lisp source code (Golden Common Lisp 1.1) 
.GC3
Lisp source code (Golden Common Lisp 1.1) 
.GCD
Generic (TM) CADD drawing (later versions) 
.GCP
Image processing file (Ground Control Point) 
.GDB
Database file (InterBase) 
.GDF
Dictionary file (GEOS) 
.GDM
Bells, whistles, and sound boards module 
.GED
Genealogical data (GEDCOM) 
.GED
Graphic Environment Document (drawing) 
.GED
Graphics editor file (EnerGraphics) 
.GED
Graphics editor native format (Arts & Letters) 
.GEM
Metafile (GEM) 
.GEM
Vector graphics (Ventura Publisher) 
.GEN
Compiled template (dBase Application Generator) 
.GEN
Generated text (Ventura Publisher) 
.GEO
Geode (Geoworks) 
.GetRight
Unfinished-Download (GetRight) 
.GFB
Compressed gif image (GIFBLAST) 
.GFC
Patton&Patton Flowcharting 4 flowchart 
.GFI
Graphics Link presentation (Genigraphics) 
.GFT
Font (NeoPaint) 
.GFX
Genigraphics Graphics Link presentation 
.GIB
Chart (Graph-in-the-Box) 
.GID
<http://searchWin2000.techtarget.com/sDefinition/0,,sid1_gci212189,00.html> Windows 95 global index (containing help status) 
.GIF
<http://searchWebServices.techtarget.com/sDefinition/0,,sid26_gci213984,00.html> Bitmap (CompuServe) 
.gif, .giff
GIF image file. 
.GIM
Graphics Link presentation (Genigraphics) 
.GIW
Presentation (Graph-in-the-Box for Windows) 
.GIX
Graphics Link presentation (Genigraphics) 
.GKH
Ensoniq EPS family disk image 
.GKS
GripKey document (Gravis) 
.GL
Animation file (GRASP graphical System for Presentation) 
.GLM
Datafile (Glim) 
.GLS
Datafile (Across) 
.GLY
Glossary (Microsoft Word) 
.GMF
CGM Graphics (APPLAUSE) 
.GMP
Tile map (Geomorph) (SPX) 
.GMR
Graphical monitor record (Schlafhorst Automation) 
.GNA
Graphics Link presentation (Genigraphics) 
.GNO
Genealogy document file (Genopro) 
.GNT
Generated executable code (Micro Focus) 
.GNX
Graphics Link presentation (Genigraphics) 
.GOC
Goc sorce code (Geoworks) 
.GOH
Goc header (Geoworks) 
.GP
Geode parameter file (Geoworks Glue) 
.GPH
Graph (Lotus 1-2-3/G) 
.GPK
Program package (Omnigo) 
.GPP
Graph paper application file (GraphPap) (Generates graph paper) 
.GR2
Screen driver (Microsoft Windows 3.x) 
.GRA
Datafile (SigmaPlot) 
.GRA
Graph (Microsoft) 
.GRB
Shell Monitor (MS-DOS v5.0) 
.GRD
Image processing grid (CHIPS) 
.GRF
Graph (Charisma Graph Plus) 
.GRF
Grapher (Golden Software) graph 
.GRP
Pictures group (PixBase) 
.GRP
Program Manager Group (Microsoft) 
.GRY
Raw graphic (GREY) 
.GS1
Presentation (GraphShow) 
.GSD
Vector graphic (Professional Draw) 
.GSM
Audio stream Raw 'byte aligned (GSM 6.10 audio stream) 
.GSM
Audio stream Raw GSM (6.10 audio stream) 
.GSM
GSM w. header/QuickLink file (US Robotics voice modems) 
.GSM
GSM w.o. header/VoiceGuide/RapidComm file (US Robotics voice modems) 
.GSP
Sketch pad file (GeoMeter Sketch Pad) 
.GSP
Zip file (Gnuzip) (Allows for output to html) 
.GSW
Worksheet (GraphShow) 
.GT2
Music module (Graoumftracker) (new) (MOD) 
.GTK
Music module (Graoumftracker) (old) (MOD) 
.GUP
Data (PopMail) 
.GWP
Greetings WorkShop file 
.GWX
Graphics Link presentation (Genigraphics) 
.GWZ
Graphics Link presentation (Genigraphics) 
.GXL
Graphics library (Genus) 
.GZ
Compressed file (Unix gzip) 
.gz
File compressed with the gzip compression program. 
.h
C/C++ program header file. 
.H
Program header (C) 
.H!
On-line Help (Flambeaux Help!) 
.H++
Header file (C++) 
.H--
Header file (Sphinx C--) 
.HA
Compressed archive (HA) 
.HAM
Driver file (Novell Netware) 
.HAM
Vector graphics saved file (Amiga) 
.HAP
Compressed archive (HA) 
.HBK
Accounting data file (Humanic Software) 
.HBK
Handbook (MathCad) 
.HCM
Configuration file (IBM HCM) 
.HCOM
Sound Tools file (HCOM) 
.HCR
Production configuration file (IBM HCD/HCM) 
.HDF
Help file (Help development kit) 
.HDF
National Center for Supercomputing Applications (NCSA) Geospatial Hierarchical Data 
.HDL
Alternate download listing (ProComm Plus) 
.HDR
Database header (Pc-File+) 
.HDR
Datafile (Egret) 
.HDR
Message header text (1st Reader) 
.HDR
Message header text (ProComm Plus) 
.HDW
Vector graphics (Harvard Draw) 
.HDX
Help index (AutoCAD) 
.HDX
Help index (Zortech C++) 
.HED
Document (HighEdit) 
.HEL
Hellbender saved game (Microsoft) 
.HEX
Macintosh BinHex <http://WhatIs.techtarget.com/definition/0,,sid9_gci211663,00.html> 2.0 file 
.HFI
HP font info (GEM) 
.HGL
Drawing file (HP Graphics Language) 
.HH
Header file (C++) 
.HH
Help system map (Generic) 
.HHH
Precompiled header (Power C) 
.HHP
Help information for remote users (ProComm Plus) 
.HIT
Audio file (HitPlayer) 
.HLB
Help library (VAX) 
.HLP
Help file (Generic) 
.HLP
Windows Help file (DataCAD) 
.HMI
Human machine interfaces MIDI music file (Descent) 
.HMM
Alternate mail read option menu (ProComm Plus) 
.HMP
Human machine interfaces MIDI music file (Descent) 
.HNC
Program files (CNC) 
.HOG
Lucas Arts Dark Forces WAD <http://WhatIs.techtarget.com/definition/0,,sid9_gci213332,00.html> file 
.HOG
Main data package file (Descent3) 
.HOG
Mission file (Descent 1-2) 
.HOT
Document file (HotSend) 
.HP8
Ascii text Roman8 character set (NewWave Write) 
.HPC
Font language file (Hewlett-Packard) 
.HPF
HP LaserJet font (Adobe Pagemaker) 
.HPF
Partial download file (HotLine) 
.HPG
HPGL Plotter vector graphics (AutoCAD) 
.HPG
HPGL Plotter vector graphics (Harvard Graphics) 
.HPI
Font information (GEM) 
.HPJ
Help Project file (Visual Basic) 
.HPK
Compressed archive (HPACK) 
.HPM
Alternative menu for privileged users (ProComm Plus) 
.HPM
Emm text (HP NewWave) 
.HPP
Header file (Zortech C++) 
.HPP
Program header (C++) 
.HQX
BinHex (Macintosh 4.0) 
.HRF
Rastor graphic (Hitachi) 
.HRM
Alternate menu for limited users (ProComm Plus) 
.HS2
Monochrome image (Postering) 
.HSC
FM synthesized music file (Used by many old games, e.g.:FINTRIS, ROL) 
.HSI
Graphic (Handmade Software, Inc.) 
.HST
History file (Generic) 
.HST
History file (ProComm Plus) 
.HT
HyperTerminal file 
.HTA
A HTML file that has been used to by viruses to update the system registry 
.HTM
A Web page (a file containing Hypertext Markup Language - HTML - markup) 
.htm, .html, .shtm, .html
Hypertext Markup Language. A web page of some sort. 
.HTML
<http://searchWebServices.techtarget.com/sDefinition/0,,sid26_gci212286,00.html> A Web page (a file containing Hypertext Markup Language - HTML - markup) 
.HTT
Hypertext template (Microsoft) 
.HTX
Template (Extended HTML) 
.HWD
Presentation (Hollywood) 
.HWP
Korean word processor document format (HanGul) 
.HXM
Alternate protocal selection menu (ProComm Plus) 
.HXM
HAM extension (Descent2) 
.HXX
Header file (C++) 
.HY1
Hyphenation algorythm (Ventura Publisher) 
.HY2
Hyphenation algorythm (Ventura Publisher) 
.HYC
Datafile (WordPerfect for Windows) 
.HYD
Hyphenation dictionary (WordPerfect for Windows) 
.HYM
3D Image binary file (Hymarc Scandata Scanner) 
.HYP
Compressed archive (HYPER) 
.I
Intermediate file (Borland C++) 
.i
SWIG source, or C preprocessor output. 
.IAN
Text file (Sterling Software) (Groundworks COOL Business Team Model) 
.IAX
Bitmap (IBM Image Acess eXecutive) 
.IBM
Compressed archive (ARCHDOS, IBM Internal only) 
.ICA
Bitmap graphic (Image Object Content Architecture) 
.ICA
Citrix file 
.ICB
Targa bitmap 
.ICC
Catalog file (IronClad) 
.ICC
Printer file (Kodak) 
.ICD
Drawing file (IronClad) 
.ICL
Icon Library (Generic industry standard) 
.ICM
Image Color Matching profile 
.ICN
Icon source code 
.ICO
Icon (Microsoft Windows 3.x) 
.ICS
Scene file (IronClad) 
.ID
Disk identification file (Generic) 
.IDB
Intermediate file (Microsoft Developer) 
.IDD
MIDI <http://WhatIs.techtarget.com/definition/0,,sid9_gci212572,00.html> Instrument Definition 
.IDE
Project file (Borland C++ v4.5) 
.IDF
MIDI Instrument Definition (Windows 95 required file) 
.IDIF
Identification file (Netscape saved address book) 
.IDQ
Data Query (Internet) 
.IDW
Vector graphic (IntelliDraw) 
.IDX
Index file (Microsoft Clip Gallery v. 1.x) 
.IDX
Index file (Pro/Engineer) 
.IDX
Microsoft Outlook Express file 
.IDX
Relational database index (Microsoft FoxPro) 
.IDX
Relational database index (Symantec Q&A) 
.IFD
Form (JetForm Design) 
.IFF
Image (Sun TAAC/SDSC Image Tool) 
.IFF
Interchange file, (general purpose data storage format)) 
.IFO
Digital Video Disk (DVD) datafile 
.IFO
Graphic object layer data (ImageForge Pro) 
.IFP
Script file (KnowledgeMan) 
.IFS
Compressed fractal image (Yuvpak) 
.IFS
Create executable library (ImageForge/ImageForge Pro) 
.IFS
System file (OS/2) 
.IGES
Initial Graphics Exchange Specification (Generic) 
.IGF
Metafile (Inset Systems) 
.IIF
Interchange file (QuickBooks for Windows) 
.IIM
Music module 
.ILB
Datafile (Scream Tracker) 
.ILBM
Bitmap (graphic image) 
.ILK
Program outline (Microsoft ILink incremental linker) 
.IM8
Raster graphic (Sun Microsystems) 
.IMA
Image (WinImage) 
.IMA
Vector graphic (EGO,Chart) 
.IMF
MIDI music file (Corridor 7, Blake Stone, Wolfenstein 3D, Spear of Destiny) 
.IMG
Bitmap graphic (Ventura Publisher) 
.IMG
Image (GEM) 
.IMP
Spreadsheet (Lotus Improv) 
.IMQ
Image presentation (ImageQ) 
.IMS
Create executable library data (IconForge) 
.in
configure input file. 
.IN$
Installation file (HP NewWave) 
.IN3
Input device driver (Harvard Graphics v3.0) 
.INB
Test script (Vermont High Test) 
.inbound
internet email message (Microsoft Exchange Server v 5.0) 
.INC
Include file (Assembler language or Active Server) 
.IND
Index (dBase IV) 
.IND
Shared Database file (Specifically in Microsoft Windows) 
.Individual
Software MultiModule screensaver 
.INF
Information file (Generic) 
.INF
Install script (Generic) 
.INF
Type I LaserJet font information file 
.info
Info pages read with the info command. 
.INI
Bank setup file (Gravis UltraSound) 
.INI
Initialization file (Generic) 
.INI
Setup file (MWave DSP synth's mwsynth.ini GM) 
.INK
Pantone reference fills file (CorelDRAW) 
.INL
Inline function file (Microsoft Visual C++) 
.INP
Source code for form, (Oracle,version 3.0 and earlier) 
.INRS
INRS-Telecommunications audio 
.INS
Datafile (WordPerfect for Windows) 
.INS
Install script (InstallShield) 
.INS
Installation script (1st Reader) 
.INS
Instrument file (Ensoniq EPS Family) 
.INS
Instrument music file (Adlib) 
.INS
Sample (Cell/II MAC/PC instruments) 
.INS
Sign-up file (X-Internet) 
.INT
Interfaced units (Borland) 
.INT
Intermediate executable code (Produced when a source program is syntax-checked) 
.INX
Index file (Foxbase) 
.IO
Compressed archive (CPIO) 
.IOB
3D graphics database (TDDD format) 
.IOC
Organizational chart (Instant ORGcharting!) 
.IOF
Findit document (Microsoft Findit) 
.ION
File description (4dos descript.ion) 
.IPL
Pantone Spot reference pallette (CorelDRAW) 
.IPS
International patching system binary patch file 
.IQY
Internet inquiry (Microsoft) 
.IRS
Resource file (WordPerfect for Windows) 
.ISD
Spell checker dictionary (RapidFile) 
.ISH
Compressed archive (ISH) 
.ISO
<http://searchCIO.techtarget.com/sDefinition/0,,sid19_gci214046,00.html> Lists the files on a CD-ROM; based on the ISO 9660 CD-ROM file system standard 
.ISO
ISO (International Standards Organization table, aka: ISO) 
.ISP
Sign-up file(X-Internet) 
.IST
Instrument file (Digitaltracker) 
.ISU
Uninstall script (InstallShield) 
.IT
Music module (MOD) (Impulse Tracker) 
.IT
Settings file (intalk) 
.ITF
Interface file (JPI Pascal TopSpeed) 
.ITI
Instrument file (Impulse Tracker) 
.ITS
Internet document set (possibly a Microsoft file) 
.ITS
Sample file (Impulse Tracker) 
.IV
Open Inventor file 
.IVD
Microdata dimension or variable-level file (Beyond 20/20) 
.IVP
User subset profile (Beyond 20/20) 
.IVT
Table or aggregate data (Beyond 20/20) 
.IVX
Microdata directory (Beyond 20/20) 
.IW
Presentation flowchart (IconAuthor-HSC Interactive) 
.IW
Screensaver (Idlewild) 
.IWA
Text file (IBM Writing Assistant) 
.IWC
Install Watch document 
.IWM
Start file (IconAuthor) 
.IWP
Text file (Wang) 
.IZT
Binary token file (IZT) 
.J62
Ricoh camera file 
.JAR
Java ARchive (a compressed file for applets and related files) 
.JAS
Graphic (Generic) 
.JAVA
Source code (Java) 
.JBD
Datafile (SigmaScan) 
.JBF
Image browser file (Paint Shop Pro) 
.JBX
Project file (Project Scheduler 4.0) 
.JFF
JPEG <http://searchWebServices.techtarget.com/sDefinition/0,,sid26_gci212425,00.html> image 
.JFIF
JPEG <http://searchWebServices.techtarget.com/sDefinition/0,,sid26_gci212425,00.html> image 
.JIF
JPEG <http://searchWebServices.techtarget.com/sDefinition/0,,sid26_gci212425,00.html> image 
.JMP
Discovery chart-to-statistics (SAS JMP) 
.JN1
Jill of the Jungle data (Epic MegaGames) 
.JNB
Workbook file (Sigma Plot 5) 
.JOB
Vector graphics file created by conversion of a IMG file (QuestVision) 
.JOR
Journal (Microsoft SQL Server) 
.JOU
Journal backup (VAX Edt editor) 
.JPC
Graphic (Japan PIC) 
.JPE
JPEG <http://searchWebServices.techtarget.com/sDefinition/0,,sid26_gci212425,00.html> image 
.JPEG
<http://searchWebServices.techtarget.com/sDefinition/0,,sid26_gci212425,00.html> 
.JPEG
compressed bitmap 
.JPG
JPEG bitmap 
.jpg, .jpeg
JPEG image file. 
.JS
JavaScript source code 
.JSD
Jet Suite document (eFAX) 
.JSP
A HTML page containing a reference to a Java servlet 
.JTF
Bitmap graphic (JPEG Tagged Interchange Format) 
.JTF
Fax document (Hayes JT Fax) 
.JTF
JPEG bitmap 
.JTK
Java ToolKit file (Sun Microsystems) 
.JW
Text document (JustWrite) 
.JWL
Library (JustWrite) 
.JZZ
Spreadsheet (Jazz) 
.K25
Sample file (Kurzweil 2500) 
.KAR
MIDI file (text+MIDI) (Karaoke) 
.KB
Keyboard script (Borland C++ 4.5) 
.KB
Program source code (Knowledge Pro) 
.KBD
Keyboard mapping script (Procomm Plus, LocoScript, Signature) 
.KBM
Keyboard mapping script (Reflection 4.0) 
.KCL
Lisp source code (Kyoto Common Lisp) 
.KDC
Image (Kodak Photo-Enhancer) 
.KEX
Macro (KEDIT) 
.KEY
Datafile (Forecast Pro) 
.KEY
Icon toolbar (DataCAD) 
.KEY
Keyboard Macro 
.KEY
Security file (Such as a software registration number) 
.KFX
Image (KoFax Group 4) 
.KIZ
Digital postcard (Kodak) 
.KKW
Contains all K-keywords in the RoboHELP Help project Index Designer not associated with topics 
.KMP
KeyMaP (Korg Trinity) 
.KPP
Toolpad (SmartPad) 
.KPS
Bitmap graphic (IBM KIPS) 
.KQP
Native Camera file (Konica) 
.KR1
Sample (multi-floppy) file (Kurzweil 2000) 
.KRZ
Sample file (Kurzweil 2000) 
.KSF
Sample File (Korg Trinity) 
.KYB
Keyboard mapping (FTP) 
.KYE
Game data (Kye) 
.L
Linker directive file (WATCOM wlink) 
.L
Source code (Lex) 
.L
Source code (Lisp) 
.LAB
Datafile (NCSS-SOLO) 
.LAB
Label file (Visual dBase) 
.LAB
Mailing labels (Microsoft Excel) 
.LAN
Loadable module (LAN DLL) (NetWare) 
.LAY
Clipart file (Printmaster Gold) 
.LAY
Word Chart layout (APPLAUSE) 
.LBG
Label generator data (dBase IV) 
.LBL
Label (Clipper 5) 
.LBL
Label (dBase IV) 
.LBL
Label (dBFast) 
.LBM
Bitmap (DeluxePaint) 
.LBM
Linear Bitmap graphics (XLib) 
.LBO
Compiled label (dBase IV) 
.LBR
Compressed archive (LU) 
.LBR
Display driver (Lotus 1-2-3) 
.LBT
Labels (Microsoft FoxPro) 
.LBX
Labels (Microsoft FoxPro) 
.LCF
Linker control file (Norton Guides compiler) 
.LCH
Used in a program (unknown) that monitors a network's response time 
.LCK
Lockfile (Paradox) 
.LCL
Datafile (FTP) 
.LCN
Lection document (WordPerfect for Windows) 
.LCS
Data History file (ACT!) 
.LCW
Spreadsheet (Lucid 3-D) 
.LD
Long distance area codes file (Telix) 
.LD1
Overlay file (dBase) 
.LDB
Lock file (Microsoft Access) 
.LDF
Library definition file (Geoworks Glue) 
.LDIF
Structured text file used for sharing information between E-Mail clients (Microsoft, Netscape and others) 
.LDL
Library (Corel Paradox) 
.LEG
Legacy document 
.LES
System game profiles (same as REG file) (Logitec Entertainment) 
.LEV
Level file (NetHack 3.x) 
.LEX
Dictionary file (Generic) 
.LFD
Data resource file (LucasArts Dark Forces) 
.LFP
LaserForms Plus file (Evergreen) 
.LFT
Laser printer font (ChiWriter) 
.LFT
Loft file (3-D Studios) (DOS) 
.LG
Logo procedure definition (LSRHS Logo) 
.LGC
Application log file 
.LGD
Application log file 
.LGO
Header and footer logo (SuperFax) 
.LGO
Logo file (PaintBrush) 
.LGO
Startup logo (Microsoft Windows 3.x-9.x) 
.LHA
Alternate file suffix for LZH 
.LHA
Compressed Archive (LHA/LHARC) 
.LHW
Compressed Amiga archive (LHWARP) 
.LIB
Library file (Generic) 
.LIF
Compressed archive (Generic) 
.LIF
Logical Interchange data (Hewlett-Packard) 
.LIM
Compressed archive (LIMIT) 
.LIN
Interactive music sequencing data file (Electronic Arts) 
.LIN
Line type file (DataCad) 
.LIS
Listing (VAX) 
.LIS
Output file produced by a Structured Query Reporting (SQR) program 
.LIX
Logos library system file 
.lj
LaserJet file. Suitable input to a HP LaserJet printer. 
.LJ
Text file (Hewlett-Packard LaseJet II printer) 
.LK
Database file (OpenSight-16 bit) 
.LKO
Linked object (Microsoft Outlook Express Junkmail file) 
.LL3
Document file (LapLink III) 
.LLX
Exchange agent (Laplink) 
.LNK
Datafile (Revelation) 
.LNK
Linker response file (RTLink) 
.LNK
Shortcut file (Microsoft Windows 9.x) 
.LOD
Load file (Generic) 
.LOG
Log file (Generic) 
.log
Log file of a system service. This file grows with status messages of some system program. 
.LOK
Compressed file (FileWrangler) 
.LP
A document reader used for downloading mortgage closing information (DesertDocs) 
.LPC
Printer driver (TEKO) 
.LPD
Helix Nuts and Bolts file 
.LPI
Information file for laser printers (common with some scanning sofware) 
.LRC
Video phone file (Intel) 
.LRF
Linker response file (Microsoft C/C++) 
.LRS
Language resource file (WordPerfect for Windows) 
.LSF
Logos library system file 
.LSL
Saved library (Corel Paradox) 
.LSL
Script library (Lotus) 
.lsm
LINUX Software Map entry. 
.LSP
AutoLISP, CommonLISP, and other LISP language files 
.LSS
Spreadsheet (Legato) 
.LST
Keyboard macro (1st Reader) 
.LST
List file (Generic) 
.LST
Spool file (Oracle) 
.LTM
Form (Lotus Forms) 
.LU
Library unit file (ThoughtWing) 
.LVL
Miner Descent/D2 Level extension (Parallax Software) 
.LWD
Text document (LotusWorks) 
.LWF
Wavelet graphics file (Luratech) 
.LWLO
Layered Object file (Lightwave) 
.LWOB
Object file (Lightwave) 
.LWP
Wordpro 96/97 file (Lotus) 
.LWSC
Scene file (Lightwave) 
.LWZ
Linguistically enhanced sound file (Microsoft) 
.LYR
Layer file (DataCAD) 
.lyx
LyX word processor document. 
.LZD
Difference file for binaries (Ldiff 1.20) 
.LZH
Compressed archive (LH ARC) 
.LZS
Compressed archive (LARC) 
.LZS
Data file (Skyroads) 
.LZW
Compressed Amiga archive (LHWARP) 
.LZX
Compressed archive (Generic) 
.M
Macro module (Brief) 
.M
Program file (Matlab) 
.M
Standard package (Mathematica) 
.M11
Text file (MASS11) 
.M1V
MPEG-related file (MIME type 'mpeg') 
.M3
source code file (Modula 3) 
.M3D
3D animation (Corel Motion) 
.M3U
MPEG URL (MIME audio file) (MP3 Playlist) 
.M4
M4 Preprocessor file (Unix) 
.MA3
Macro (Harvard Graphics 3.0) 
.MAC
Image (MacPaint) 
.MAC
Macro (Generic) 
.MAD
Module (Microsoft Access) 
.MAF
Form (Microsoft Access) 
.MAG
A graphics format found in some Japanese files 
.MAG
MAG graphics format created by Woody Lynn (MPS Magro Paint System) 
.MAGIC
Configuration file (Magic Mail Monitor) 
.MAI
Mail (VAX) 
.MAK
Makefile (Generic) 
.MAK
Project (Visual Basic or Microsoft C++) 
.MAM
Macro (Microsoft Access) 
.MAN
Command module (Unix) 
.man
Man page. 
.MAN
Manual page output (Unix) 
.MAP
Color pallette (Generic) 
.MAP
Format data (Micrografx Picture Publisher) 
.MAP
Linker map file 
.MAP
Map file (Atlas MapMaker) 
.MAP
Map file (Generic) 
.MAP
Map file used for color choices (Pro/Engineer) 
.MAP
Network map (AccView) 
.MAP
WAD <http://WhatIs.techtarget.com/definition/0,,sid9_gci213332,00.html> game file (Duke Nukem 3D) 
.MAQ
Query (Microsoft Access) 
.MAR
Assembly program (VAX Macro) 
.MAR
Report (Microsoft Access) 
.MAS
Graphics file (Lotus Freelance Smartmaster) 
.MAT
Binary file (Matlab) 
.MAT
Table (Microsoft Access) 
.MAUD
Sample format (Maud) 
.MAX
3D scene (Kinetix 3D Studio Max) 
.MAX
Document (Paperport) 
.MAX
Layout file (OrCad) 
.MAX
Source code (MAX) 
.MAZ
A format use by Division's dVS/dVISE 
.MAZ
Maze data file (Hover) 
.MB
Memo field values for database (Paradox) 
.MB1
Data file (Apogee Monster Bash) 
.MBK
Multiple index archive (dBase IV) 
.MBOX
Mailbox file (Berkeley Unix) 
.MBX
Extension Microsoft Outlook adds to saved email, Eudora mailboxes 
.MCC
Calling card (Dialer10) 
.MCC
Configuration file (MathCad) 
.MCD
Document (MathCad) 
.MCF
Font file (MathCad) 
.MCF
Magic control file 
.MCI
Command script (Media Control Interface) 
.MCP
Application script (Capsule) 
.MCP
Printer driver (MathCad) 
.MCP
Project file (Metrowerks CodeWarrior) 
.MCR
Keyboard macro file (DataCad) 
.MCW
Document (Microsoft Word for Macintosh) 
.MCW
Text document (MacWrite II) 
.MD
Compressed archive (MDCD) 
.MDA
Add-in file (Microsoft Access) 
.MDA
Workgroup (Microsoft Access version 2) 
.MDB
Database (Microsoft Access) 
.MDE
MDE file (Microsoft Access) 
.MDL
Model (3D Design Plus) 
.MDL
Model file (Quake) 
.MDL
Model file element (Rational Rose) 
.MDL
Music module (MOD) (Digital Trakker) 
.MDL
Spreadsheet (CA-Compete!) 
.MDM
Modem definition (Telix) 
.MDN
Blank database template (Microsoft Access) 
.MDT
Add-in file (Data) (Microsoft Access) 
.MDT
Data table (Microsoft ILink incremental linker) 
.MDW
Workgroup (Microsoft Access) 
.MDX
Multiple index file (dBase IV) 
.MDZ
Wizard template (Microsoft Access) 
.ME
ASCII text document (Generic) 
.MEB
Macro editor bottom overflow library (WordPerfect for Windows) 
.MED
Macro editor delete save file (WordPerfect for Windows) 
.MED
Music module (MOD) (OctaMed Music Editor) 
.MEM
Macro editor macro (WordPerfect for Windows) 
.MEM
Memory variable save file (Clipper) 
.MEM
Memory variable save file (dBase IV) 
.MEM
Memory variable save file (Microsoft FoxPro) 
.MEQ
Macro editor print queue file (WordPerfect for Windows Library) 
.MER
Format for interchanging spreadsheet/database data; recognized by Filemaker, Excel, and others 
.MER
Macro editor resident area (WordPerfect for Windows Library) 
.MES
Macro editor workspace file (WordPerfect for Windows) 
.MES
Message file (Generic) 
.MET
Document file (OmniPage Pro) 
.MET
Macro editor top overflow file (WordPerfect for Windows Library) 
.MET
Presentation Manager metafile 
.MEU
Menu group (DOS Shell) 
.MEX
Executable command (Matlab) 
.MEX
Macro editor expound file (WordPerfect for Windows) 
.mf
Meta-Font font program source file. 
.MF
Metafont text file 
.MFG
Manufacturing file (Pro/ENGINEER) 
.MGF
A file in a Materials and Geometry Format 
.MGF
Font file (MicroGrafx) 
.MHT
MHTML document (Microsoft) 
.MHTM
MHTML document (MIME) 
.MHTML
MHTML document (MIME) 
.MI
Data file (Cocreate ME10) 
.MI
Miscellaneous file (Generic) 
.MIC
Image Composer file (Microsoft) 
.MID
MIDI <http://WhatIs.techtarget.com/definition/0,,sid9_gci212572,00.html> music 
.MIF
Interchange format (Adobe FramMaker) 
.MIFF
Machine Independent File (Generic) 
.MII
Datafile (MicroStat-II) 
.MIM
<http://searchWebServices.techtarget.com/sDefinition/0,,sid26_gci212575,00.html> A multipart file in the Multi-Purpose Internet Mail Extensions (MIME <http://searchWebServices.techtarget.com/sDefinition/0,,sid26_gci212576,00.html>) format; often created as the result of sending e-mail with attachments in AOL. The files in a multipart MIM file can be "opened" (unarchived and separated into individual files) using Winzip or a similar program. 
.MIME
<http://searchWebServices.techtarget.com/sDefinition/0,,sid26_gci212576,00.html> 
.MIX
Object file (Power C) 
.MIX
Package file (Command & Conquer) 
.MIX
Picture file (Microsoft PhotoDraw 2000) 
.MIX
Picture file (Microsoft Picture-It!) 
.MIX
Resource archive (Westwood Studios) 
.MJF
Audio file similar to MP3 (Mjuice) (Opens with WinAmp) 
.MK
Makefile (Generic) 
.MKE
Makefile (Microsoft Windows SDK) 
.MKI
Graphic Image (MagView 5.0) (Japanese) 
.MKS
Datafile (TACT) 
.ML3
Project file (Milestones 3.x) 
.MLB
Macro library (Symphony) 
.MLI
A file in 3D Studio's Material-Library format 
.MLID
Muliple link interface driver file (Generic) 
.MLM
Groupwise email file (Novell Groupwise) 
.MM
Text file (MultiMate Advantage II) 
.MMC
Catalog file (Microsoft Clip Gallery 5.x) 
.MME
<mim.htm> A multipart file in the Multi-Purpose Internet Mail Extensions (MIME <http://searchWebServices.techtarget.com/sDefinition/0,,sid26_gci212576,00.html>) format; often created as the result of sending e-mail with attachments in AOL. The files in a multipart MME file can be "opened" (unarchived and separated into individual files) using Winzip or a similar program. 
.MMF
Mail file (Microsoft) 
.MMF
Mail message file (Microsoft Mail) 
.MMF
Meal Master Format, a recipe catologing format 
.MMG
Beyond 20/20 table or aggregate data file 
.MML
Bulk mail file (Created by MyMailList) 
.MMM
Multimedia movie (MacroMind Director 3.x) 
.MMM
Multimedia movie (Microsoft) 
.MMO
Memo Writer file (RapidFile) 
.MMP
MindManager file (MindMapor) 
.MMP
Output video (Bravado) 
.MN2
Mission file (Descent2) 
.MN3
Mission file (Descent3) 
.MND
Menu source (AutoCAD Menu Compiler) 
.MND,
MNI Mandelbrot for Windows 
.MNG
Map (DeLorme Map'n'Go) 
.MNG
Multi-image Network Graphics 
.MNT
Menu file (Microsoft FoxPro) 
.MNU
Advanced macro (HP NewWave) 
.MNU
Interact menu (Intertal Systems) 
.MNU
Menu (AutoCAD Menu Compiler) 
.MNU
Menu (Norton Commander) 
.MNU
Menu file (Visual dBase) 
.MNX
Compiled menu (AutoCAD) 
.MNX
Menu (Microsoft FoxPro) 
.MNY
Account book (Microsoft Money) 
.MOB
Device definition (PEN for Windows) 
.MOD
Amiga/PC tracker module 
.MOD
FastTracker, StarTrekker, Noise Tracker (etc.) music module file 
.MOD
Kernel module (Microsoft Windows 9.x) 
.MOD
Modula-2 source code file (Clarion Modula-2) 
.MOD
Spreadsheet (Microsoft Multiplan) 
.MON
Monitor description (ReadMail) 
.MOV
Movie (AutoCAD/AutoFlix) 
.MOV
Movie (QuickTime for Microsoft Windows) 
.MOZ
Zipped (Compressed) mod file 
.MP2
MPEG Audio Layer 2 file (MIME video file) 
.MP2
MPEG Audio Layer 2 
.MP3
MPEG Audio Layer 3 (AC3) file 
.MP3
MPEG Audio Layer 3 (AC3) 
.MPA
MPEG-related file (MIME type 'mpeg') 
.MPC
Calendar file (Microsoft Project) 
.MPD
Database file (Microsoft Project) 
.MPE
MPEG animation 
.MPEG
<http://WhatIs.techtarget.com/definition/0,,sid9_gci212601,00.html> 
.MPEG
animation 
.MPG
MPEG animation 
.MPM
Mathplan Macro library (WordPerfect for Windows) 
.MPP
Drawing file (CAD) 
.MPP
Project file (Microsoft Project) 
.MPR
Menus (compiled) (Microsoft FoxPro) 
.MPT
Bitmap graphics (Multipage TIFF) 
.MPV
View file (Microsoft Project) 
.MPX
Compiled menu program (Microsoft FoxPro) 
.MPX
Exchange file (Microsoft Project) used for exporting data 
.MRB
Multiple resolution bitmap graphics (Microsoft C/C++) 
.MRI
MRI Scan 
.MRS
Macro resource file (WordPerfect for Windows) 
.MSA
Archive (Magic Shadow) 
.MSC
Common console document (Microsoft Windows 2000) 
.MSC
Makefile (Microsoft C) 
.MSD
Diagnostics report file (Microsoft MSD) (Diagnostics) 
.MSDL
Scene Description Language (Manchester) 
.MSG
Mail message (Microsoft) 
.MSI
Installer package (Microsoft Windows) 
.MSN
Mission File (Descent) 
.MSN
Network document (Microsoft) 
.MSP
Paint bitmap (Microsoft) 
.MSP
Windows Installer patch file 
.MSS
Manuscript text file (Jove) 
.MSS
Manuscript text file (MINCE) 
.MSS
Manuscript text file (Perfect Writer) 
.MSS
Manuscript text file (Scribble) 
.MST
Minispecification file (Prosa) 
.MST
Setup script (Microsoft SDK) 
.MST
Windows Installer transform 
.MSW
Text file (Microsoft Word) 
.MSX
Compressed CP/M archive (MSX) 
.MTH
Math file (Derive) 
.MTM
Music module (MOD) (Multitracker) 
.MTW
Datafile (Minitab) 
.MTX
Twain device driver (32 bit)(UMax) 
.MU
Menu (Quattro Pro) 
.MUL
Online game called Ultima online 
.MUS
Interactive music audio data file (Electronic Arts) 
.MUS
Music (Generic) 
.MUS
Music (MusicTime) 
.MUS10
Audio (Mus10) 
.MV
Server-side script file (Miva) 
.MVA
Video accelerator file (Matrox) 
.MVB
Multimedia Viewer file (Microsoft) 
.MVC
Image file (Sony Digital Mavica) 
.MVE
Interplay video file (Descent2, Fallout2) 
.MVF
Stop frame file (AutoCAD-AutoFlix) 
.MVI
Movie command file (AutoCAD-AutoFlix) 
.MVW
Log file (Saber LAN) 
.MWF
Animation (ProMotion) 
.MWP
Smartmaster file (Lotus WordPro 97) 
.MXD
Map file (ArcInfo) 
.MXT
Datafile (Microsoft C) 
.MYP
Presentation file (Make Your Point) 
.M_U
Hard Drive Boot sector backup (MazeGold) 
.NAN
Nanoscope files (Raw Grayscale) 
.NAP
Metafile (NAP) 
.NAP
Video file (EnerGraphics) 
.NB
Text file (Nota Bene) 
.NC
Instructions for numerical control machine (CAMS) 
.NCB
Developer Studio file (Microsoft) 
.NCC
CNC (Computer Numeric Control) file (CamView 3D) 
.NCD
Change directory (Norton) 
.NCF
Command File (Netware) 
.NCF
Internal clipboard (Lotus Notes) 
.NDB
Network database (Intellicom) 
.NDO
3D low-polygon modeler (Nendo) 
.NDX
Database file (1ACT! for Microsoft Windows) 
.NDX
Index file (Cindex) 
.NDX
Index file (dBase II-III-IV) 
.NEO
Raster graphics (Atari Neochrome) 
.NES
Emulator ROMS for game console (Nintendo) 
.NET
Netlist output file (Orcad Schematic Capture) 
.NET
Network configuration file 
.netCDF
Network Common Data Form 
.NEW
New info 
.NEZ
Emulator file used for game consoles (NES) 
.NFF
Neutral File Format 
.NFO
Info file database text 
.NFO
Infobase file (Folio) 
.NFT
Template file (Netobject Fusion) 
.NG
Online documentation database (Norton Guide) 
.NIL
Icon Library file (EasyIcons-compatible) (Norton) 
.NIST
Audio (NIST Sphere) 
.NLB
Data (Oracle 7) 
.NLM
Loadable Module (Netware) 
.NLS
National Language Support file used for localization <http://searchCIO.techtarget.com/sDefinition/0,,sid19_gci212496,00.html> (for example, by Uniscape <http://www.uniscape.com/index.shtml>) 
.NLU
E-Mail Trigger file (Norton LiveUpdate) 
.NLX
Form (FormWorx 3.0) 
.NOD
File (Netobject Fusion) 
.NP
Project schedule (Nokia Planner) 
.NP
Project schedule (Visual Planner 3.x) 
.NPI
Source for interpreter (dBase Application Generator) 
.NRF
Data file (NICOLET) 
.NRG
Image file (Nero) 
.NS2
Database (Lotus Notes version 2) 
.NS3
Database (Lotus Notes version 3) 
.NS4
Database (Lotus Notes version 4) 
.NSF
Database (Lotus Notes) 
.NSO
Document file (NetObject Fusion) 
.NST
Music module (MOD) (Noise Tracker) 
.NT
Startup files (Microsoft Windows NT) 
.NTF
Database template (Lotus Notes) 
.NTR
Executable ASCII text file 
.NTS
Executable ASCII text file 
.NTS
Tutorial (Norton) 
.NTX
Index file (CA-Clipper) 
.NUF
Message for new users (1st call) (Procomm Plus) 
.NWC
Song file (Noteworthy Composer) 
.NWS
News message (MIME RFC822) (Microsoft Outlook Express) 
.NXT
Sound file (NeXT) 
.O
Object file (Atari) 
.O
Object file (GCC) 
.O
Object file (Unix) 
.O$$
Outfile (Sprint) 
.OAS
Word processor document (Fujitsu OAS)(Japanese) 
.OAZ
Fax (NetFax Manager) 
.OB
Object cut/paste file (IBM LinkWay) 
.OBD
Binder (Microsoft Office) 
.OBD
Binder template (Microsoft Office) 
.OBJ
Object file 
.OBR
Object browser data file (Borland C++) 
.OBS
Script (ObjectScript) 
.OBV
Visual interface (ObjectScript) 
.OBZ
Binder Wizard (Microsoft Office) 
.OCF
Object craft file (Object Craft) 
.OCR
Transcribed fax-to-text file (FAXGrabber) 
.ODL
Type library source (Visual C++) 
.ODS
Mailbox file (Microsoft Outlook Express) 
.OFD
Form definition (ObjectView) 
.OFF
Object File (3D Mesh) 
.OFN
FileNew file (Microsoft Office) 
.OFT
Template (Microsoft Outlook) 
.OKR
Feldeinteilung module file (3-D Fassade Plus) 
.OKT
Music module (MOD) (Oktalyzer) 
.OLB
Object Library (OLE) (Microsoft) 
.OLB
Object library (VAX) 
.OLD
Backup file (Generic) 
.OLE
<http://searchWin2000.techtarget.com/sDefinition/0,,sid1_gci214126,00.html> Object Linking and Embedding (OLE) custom control (Microsoft) 
.OLE
<http://searchWin2000.techtarget.com/sDefinition/0,,sid1_gci214126,00.html> OLE object 
.OLI
Text file (Olivetti) 
.OO1
Voice file (Typhoon) 
.OOGL
Object Oriented Graphics Library 
.OOM
Swap file (Shroom) 
.OPJ
Project file (Orcad Schematic Capture) 
.OPL
Organiser Programming Language source file (Psion/Symbian) 
.OPN
Active options (Exact) 
.OPO
Output executable file (OPL) 
.OPT
Developer Studio file (Microsoft) 
.OPT
Optimize support file (QEMM) 
.OPW
Organization chart (Org Plus for Windows) 
.OPX
Extension DLL (OPL) 
.OPX
Inactive options (Exact) 
.OR2
Calendar file (Lotus Organizer 2) 
.OR3
Lotus Organizer 97 file 
.ORA
Configuration file (Oracle 7) 
.ORA
Parameter file (Oracle) 
.ORC
Script (Oracle 7) 
.ORG
Calendar file (Lotus Organizer) 
.OSS
Search file (Microsoft Office) 
.OST
Offline file (Microsoft Exchange/Outlook) 
.OTL
Outline font description (Z-Soft Type Foundry) 
.OTL
Template file (PrintMaster Gold) 
.OTL
Template file (Super NoteTab) (Fookes) 
.OTX
Text file (Olivetti Olitext Plus) 
.OUT
Output file (Microsoft C) 
.OV
Database file (Revelation-DOS) 
.OV1
Overlay file 
.OV2
Overlay file 
.OVD
Datafile (ObjectVision) 
.OVL
Overlay file 
.OVR
Overlay file 
.P
Application parameter file (ReaGeniX code generator) 
.P
Picture file (APPLAUSE) 
.P
Source code (Pascal) 
.P10
Plot 10 drawing (Tektronics) 
.P16
16 Channel Music file (ProTracker 16) 
.P22
Patch file (Patch 22) 
.P3
Project Planner file (Primavera) 
.P65
Document file (PageMaker 6.0) 
.P7C
Digital ID file (MIME) 
.PA1
Worktable (PageAhead) 
.PAB
Personal Address Book (Microsoft) 
.PAC
Image (Stad) 
.PAC
Package file (Sound Blaster Studio II) 
.PAD
Keypad definition (Telemate) 
.PAK
Compressed archive (PAK) 
.PAK
WAD <http://WhatIs.techtarget.com/definition/0,,sid9_gci213332,00.html> file (Quake) 
.PAL
A compressed file (Generic) 
.PAL
Color palette (Microsoft) 
.PAN
Printer specific file (CorelDRAW) 
.PAQ
Password encrypted zip file (Hewlett-Packard) 
.PAR
Parameter file (Fractint) 
.PAR
Parts application (Digitalk PARTS) 
.PAR
Permanent output file (Microsoft Windows 3.x) 
.PAS
Source code file (Borland Pascal) 
.PAT
exePatch utility used for Warcraft2 (WarHack) 
.PAT
Hatch pattern file (DataCAD) 
.PAT
Patch file (Advanced Gravis Ultrasound/Forte Technologies) 
.PAT
Pattern file (CorelDRAW) 
.pattern
colors 
.PB
Fax (FAXability Plus) 
.PB
Phone book (WinFax Pro) 
.PB
Setup file (PixBase) 
.PB1
Document (First Publisher for Windows) 
.PBA
Source code file (Powerbasic BASIC) (Genus) 
.PBD
Dynamic library, an alternative to a native <http://searchVB.techtarget.com/sDefinition/0,,sid8_gci212624,00.html> DLL <http://searchWin2000.techtarget.com/sDefinition/0,,sid1_gci213902,00.html> (PowerBuilder) 
.PBD
Phone book (FaxNOW!-Faxit) 
.PBF
Turtle Beach Pinnacle Bank File 
.PBI
Include file (PowerBasic) (Genus) 
.PBI
Profiler binary input file (Microsoft Source Profiler) 
.PBK
Microsoft Phonebook 
.PBL
Library file used in a development environment (PowerBuilder) 
.PBL
PowerBasic library (Genus) 
.pbm
PBM image file format. 
.PBM
Planar bitmap graphic (XLib) 
.PBM
Portable bitmap graphic 
.PBO
Profiler binary output (Microsoft Source Profiler) 
.PBR
Resource file (PowerBuilder) 
.PBT
Profiler binary table (Microsoft Source Profiler) 
.PC
Text file (IBM) 
.PC3
Custom palette (Harvard Graphics 3.0) 
.PC8
Ascii text IBM8 character set (NewWave Write) 
.PCB
Application data file (Microsoft Powerpoint) 
.PCC
Cutout picture vector graphics (PC Paintbrush) 
.PCD
Image (Kodak Photo-CD) 
.PCD
P-Code compiled test scripts as in Microsoft Test and Microsoft Visual Test 
.PCE
Maps Eudora mailbox names to DOS filenames 
.pcf
PCF image file--intermediate representation for fonts. X Window System font. 
.PCF
Profiler command file (Microsoft Source Profiler) 
.PCH
Patch file (Generic) 
.PCH
Precompiled header file (Microsoft C/C++) 
.PCI
PCI Miniport file (Microsoft Windows System file) 
.PCJ
Multimedia authoring tool graphics (IBM Linkaway-Live) 
.PCK
Pickfile (Turbo Pascal) 
.PCL
<http://WhatIs.techtarget.com/definition/0,,sid9_gci214283,00.html> 
.PCM
Audio file 
.PCM
PCM file (OKI MSM6376 Sythesizer Chip) 
.PCP
Live Update Pro file (Symantec) 
.PCS
Animation (PICS) 
.PCS
Picture storage file (Microsoft) 
.PCT
PICT drawing (Macintosh) 
.PCW
Text file (PC Write) 
.PCX
PC Paintbrush bitmap (ZSoft) 
.pcx
PCX image file. 
.PDA
Bitmap graphics 
.PDB
Data file (TACT) 
.PDB
Database file (3Com PalmPilot) 
.PDB
Physical model backup file (PowerDesigner) 
.PDD
Graphic image that can be opened with Paint Shop Pro and Adobe PhotoDeluxe 
.PDF
<http://searchMobileComputing.techtarget.com/sDefinition/0,,sid40_gci214288,00.html> Portable Document file (Adobe Acrobat) (displayable with a Web browser) 
.PDF
Definition File 
.pdf
Formatted document similar to PostScript or dvi. 
.PDF
Graphics file (ED-SCAN 24bit) 
.PDF
Printer Definition File (Netware) 
.PDL
Project description language file (Borland C/C++) 
.PDM
Physical model file (PowerDesigner) 
.PDP
Print Shop Deluxe file (Broderbund) 
.PDQ
Flowcharting PDQ Lite file (Patton&Patton) 
.PDS
Hardware assembly source code file (Pldasm) 
.PDS
Photographic image file (origin not yet identified) 
.PDT
Database file (ProCite) 
.PDV
Printer driver (Paintbrush) 
.PDW
Document (Professional Draw) 
.PDX
Database index file (ProCite) 
.PE3
Image archive file (QuickViewer) 
.PE3
Image archive file (Ulead PhotoImpact) 
.PE4
Image archive file (Ulead PhotoImpact v.4.0) 
.PEB
Program Editor bottom overflow file (WordPerfect for Windows Library) 
.PED
Program Editor delete save file (WordPerfect for Windows) 
.PEM
Program Editor macro (WordPerfect for Windows library) 
.PEQ
Program Editor print queue file (WordPerfect for Windows) 
.PER
Program Editor resident area file (WordPerfect for Windows Library) 
.PES
Program Editor work space file (WordPerfect for Windows Library) 
.PET
Program Editor top overflow file (WordPerfect for Windows Library) 
.PF
Encrypted file (Alladin Systems) 
.PFA
Type 3 font (ASCII) 
.PFB
Type 1 font (binary) 
.pfb
X Window System font file. 
.PFC
Personal filing cabinet file (AOL) 
.PFC
PF Component file 
.PFC
Text file (First Choice) 
.PFF
Paraform file for 3D modeling (Scandata) 
.PFK
Programmable function keys (XTreePro) 
.PFM
Printer Font Metrics (Microsoft) 
.PFS
Database text file (PFS:Write) 
.PFT
Printer font (ChiWriter) 
.PG
Page cut/paste file (IBM LinkWay) 
.PGI
Printer graphics file device driver (PGRAPH Library) 
.PGL
Plotter drawing (Hewlett-Packard) 
.PGM
Portable Graymap (bitmap) 
.PGM
Program file (Signature) 
.PGN
Portable game notation file (ChessMaster and others) 
.PGP
PGP encrypted file 
.PGS
Manual page (man4dos) 
.PH
Optimized .goh file (Geoworks) 
.PH
Perl header file 
.PH
Phrase-table (Microsoft C/C++) 
.PH
Temporary file generated by Microsoft Help Compiler 
.PHN
Phone list (QmodemPro) 
.PHN
Phone list (UltraFax) 
.PHO
Phone database (Metz Phone for Windows) 
.PHP
<http://searchEnterpriseLinux.techtarget.com/sDefinition/0,,sid39_gci334246,00.html> HTML page that includes a PHP <http://searchEnterpriseLinux.techtarget.com/sDefinition/0,,sid39_gci334246,00.html> script 
.php
PHP program source code (used for web page design). 
.PHP3
HTML page that includes a PHP <http://searchEnterpriseLinux.techtarget.com/sDefinition/0,,sid39_gci334246,00.html> script 
.PHR
Phrases (LocoScript) 
.PHTML
HTML page that includes a PHP <http://searchEnterpriseLinux.techtarget.com/sDefinition/0,,sid39_gci334246,00.html> script 
.PHTML
perl <http://searchEnterpriseLinux.techtarget.com/sDefinition/0,,sid39_gci214291,00.html>-parsed HTML 
.PI1
Low resolution picture file (Dages Elite) 
.PI2
Medium resolution picture file (Dages Elite) 
.PI3
High resolution picture file (Dages Elite) 
.PIC
3D Image file (SoftImage) 
.PIC
Bitmap (PC Paint) 
.PIC
PICT drawing (Macintosh) 
.PIC
Picture file (Lotus) 
.PIC
Pixar picture file (SDSC Image Tool) 
.PICT
PICT image file (Macintosh) 
.PIF
Compressed archive (Macintosh) 
.PIF
PIF drawing (IBM) 
.PIF
Program Information File 
.PIF
Vector graphics GDF file (IBM Mainframe) 
.PIG
WAD file (Lucas Arts Dark Forces <http://WhatIs.techtarget.com/definition/0,,sid9_gci213332,00.html>) 
.PIN
Data file (Epic Pinball) 
.PIN
Data file (Epic Pinball) 
.PIX
Alias image file (SDSC Image Tool) 
.PIX
Bitmap (Inset Systems) 
.PJ
Project file (CA-SuperProject) 
.PJ
Source Integrity file (MKS) 
.PJT
Visual FoxPro memo file (Microsoft) 
.PJT
Visual Foxpro Project (Microsoft) 
.PJX
Visual FoxPro project file (Microsoft) 
.PK
Packed bitmap font file (TeX DVI) 
.PKA
Compressed file archive (PKARC) 
.PKG
Developer Studio application extension (similar to a DLL file) (Microsoft) 
.PKG
Installer script (NEXT) 
.PKR
Public Keyring (PGP) 
.PKT
Packet file (Fidonet) 
.PL
Interleaf printerleaf (or WorldView) format 
.PL
Palette (Harvard Graphics) 
.pl
Perl or Prolog program source code. 
.PL
Property list font metric file (TeX) 
.PL
Source code file (Perl) 
.PL
Source code file (Prolog) 
.PL1
Room plan (3D Home Architect) 
.PL3
Chart palette (Harvard Graphics 3.0) 
.PLB
Library file (Microsoft FoxPro) 
.PLC
Add-in file (Lotus 1-2-3) 
.PLG
A format use by REND386/AVRIL 
.PLI
Data description file (Oracle 7) 
.PLL
Pre-linked library file (Clipper 5) 
.PLM
Module (DisorderTracker2) 
.PLN
Spreadsheet (WordPerfect for Windows) 
.PLR
Pilot file (Descent 1-3) 
.PLS
MPEG PLayList file (used by WinAmp) 
.PLS
Sample file (DisorderTracker2) 
.PLT
Drawing (HPGL Plotter) 
.PLT
Palette (Generic) 
.PLT
Plot drawing (AutoCAD) 
.PLT
Pre-linked transfer file (Clipper 5) 
.PLT
Sign-making software (Gerber Optical) 
.PLY
Data file (PopMail) 
.PLY
Presentation screen (Harvard Spotlight) 
.PM
Bitmap graphics (Presentation Manager) 
.PM
Module (Perl) 
.PM3
Document (PageMaker 3.0) 
.PM4
Document (PageMaker 4.0) 
.PM5
Document (PageMaker 5.0) 
.PM6
Document (PageMaker 6.0) 
.PMC
Graphics (A4TECH Scanner) 
.PMM
Program file (Amaris BTX/2) 
.PN3
Printer device driver (Harvard Graphics 3.0) 
.PNG
<http://searchWebServices.techtarget.com/sDefinition/0,,sid26_gci214307,00.html> Bitmap (Portable Network Graphics) 
.PNG
Bitmap file (MacroMedia FireWorks) 
.PNG
Browser catalogue (Paint Shop Pro) 
.PNM
Portable aNY Map graphics (PBM) 
.PNT
Graphic file (MacPaint) 
.PNT
Pen Table plotting file (Pro/Engineer) 
.PNT
QWK reader pointer file (MarkMail 2.x) 
.PNTG
Same as PNT file 
.POG
PIG file extension (Descent2) 
.POH
Optimized .goh file (Geoworks) 
.POL
3D polygonal modeling file (Innovmetric) 
.POL
Windows NT <http://searchWin2000.techtarget.com/sDefinition/0,,sid1_gci213368,00.html> Policy file 
.POP
Message index (PopMail) 
.POP
Popup file (Visual dBase) 
.POT
PowerPoint template (Microsoft) 
.POV
Persistence of Vision file (Ray-Tracer) 
.POW
Chord chart (PowerChords) 
.PP
Compressed Amiga archive (POWERPACKER) 
.PP4
Bitmap (Picture Publisher 4) 
.PPA
PowerPoint Add-in (Microsoft) 
.PPB
Button bar for print preview (WordPerfect for Windows) 
.PPD
PostScript Printer definition file specification (Adobe Acrobat v.4.0) 
.PPF
Pinnacle Program File (Turtle Beach) 
.PPI
Graphics file (Microsoft PowerPoint) 
.PPL
PolaroidPalettePlus ColorKey device driver (Harvard Graphics 3.0) 
.PPM
Portable Pixelmap bitmap 
.PPO
Pre-processed output file (Clipper 5) 
.PPP
Desktop publishing default output file (Serif PagePlus) 
.PPP
Document or finished project (Parson Power Publisher) 
.PPS
PowerPoint slide show (Microsoft) 
.PPS
Storyboard (Personal Producer) 
.PPT
PowerPoint presentation (Microsoft) 
.PQB
Master boot backup file (PowerQuest BootMagic) 
.PQI
Drive image file (PowerQuest) 
.PR2
Presentation (Aldus Persuasion 2.x) 
.PR2
Printer driver (dBase IV) 
.PR3
Postscript printer driver (dBase IV) 
.PR3
Presentation (Aldus Persuasion 3.x) 
.PRC
Resource (text or program) file (3com PalmPilot) 
.PRD
Printer driver (Generic) 
.PRE
Presentation (Lotus Freelance) 
.PRE
Settings (Microsoft C/C++) 
.PRE
Settings (Programmer's WorkBench) 
.PRF
Output file (Profiler) 
.PRF
Pixel Run Format graphics (Improces-Fastgraph) 
.PRF
Printer driver (dBase IV) 
.PRF
Settings file (Macromedia Director) 
.PRF
System file (Microsoft Windows) 
.PRG
Program file (WAVmaker) 
.PRG
Program source files (Atari) 
.PRG
Program source files (dBase IV, Clipper 5, and Microsoft FoxPro) 
.PRI
Printer definitions (LocoScript) 
.Printer
Control Language file (printer-ready bitmap) (Hewlett-Packard) 
.PRJ
Project file (3D Studio) (DOS) 
.PRM
Parameter file (Generic) 
.PRN
Print Table (space delimited text) 
.PRN
Printer driver (Signature) 
.PRN
Text file (Lotus 1-2-3-Symphony) 
.PRN
Windows Printer file (DataCAD) 
.PRO
Configuration file (Pro/Engineer) 
.PRO
Graphics profile file (DOS) 
.PRO
Project file (Terramodel) 
.PRO
Source code file (Prolog) 
.PRP
Data conversion saved project file (Oberon Prospero) 
.PRS
Presentation file (Harvard Graphics for Windows) 
.PRS
Printer resource font file (WordPerfect for Windows) 
.PRS
Procedure file (dBase IV) 
.PRT
A print-formatted file 
.PRT
Part file (CADkey) 
.PRT
Part file (Pro/Engineer) 
.PRT
Printer driver (Dr. Halo) 
.PRV
Internet provider template file (psiMail) 
.PRX
Compiled program (Microsoft FoxPro) 
.PRZ
Graphics file (Lotus Freelance 97) 
.PS
Postscript <http://WhatIs.techtarget.com/definition/0,,sid9_gci212814,00.html>-formatted file (a Postscript printer-ready file) 
.ps
PostScript file, for printing or viewing. 
.PSB
Sound Bank file (Pinnacle) 
.PSD
Bitmap (Adobe Photoshop) 
.PSE
Bitmap graphics (IBM printer Page SEgment) 
.PSF
Outline PostScript printer font (ChiWriter) 
.PSI
A-law audio file (psion) 
.PSM
Sound data file (Epic Pinball) 
.PSM
Studio module (ProTracker) 
.PSM
Symbol table of IDE (Turbo Pascal) 
.PSP
Image file (PaintShop Pro) 
.PSP
Procedure (Prodea Synergy) 
.PSR
Report file (PowerSoft) 
.PST
Personal Folder File (Microsoft Outlook) 
.PT3
Device driver (Harvard Graphics 3.0) 
.PT3
Template (PageMaker 3.0) 
.PT4
Template (PageMaker 4.0) 
.PTB
Script file (PubTech BatchWorks) 
.PTB
Table file (Pro/Engineer) 
.PTD
Table file (Pro/ENGINEER) 
.PTL
Petal file (ASCII version of Microsoft Visual Modeler) 
.PTM
Macro (PubTech BatchWorks) 
.PTM
Music module (MOD) (Polytracker) 
.PTR
QWK reader pointer file (QMail) 
.PUB
Document (Microsoft Publisher) 
.PUB
Public key ring file (PGP) 
.PUB
Publication (Ventura Publisher) 
.PUD
Map file (WarCraftII) 
.PUT
Compressed archive (PUT) 
.PVD
Script file (Instalit) 
.PVL
Library file (Instalit) 
.PVT
Local pointlist (Fidonet) 
.PW
Text file (Professional Write) 
.PWD
Word document (Microsoft Pocket) 
.PWL
Password list file (Microsoft Windows 9.x) 
.PWP
Image file (a roll of film viewed using Photoworks) 
.PWP
Text document (Professional WritePlus) 
.PWZ
PowerPoint wizard (Microsoft) 
.PX
Primary database index (Paradox) 
.PXL
Pocket Excel spreadsheet (Microsoft) 
.PY
python <http://searchEnterpriseLinux.techtarget.com/sDefinition/0,,sid39_gci213538,00.html> Script file 
.py
Python program source code. 
.PY
Saved emessages (YAHOO) 
.PYC
python <http://searchEnterpriseLinux.techtarget.com/sDefinition/0,,sid39_gci213538,00.html> Compiled script file 
.PZD
Default settings (Pizazz Plus) 
.PZO
Overlay file (Pizazz Plus) 
.PZP
Palette (Pizazz Plus) 
.PZS
Settings (Pizazz Plus) 
.PZT
Transfer file (Pizazz Plus) 
.PZX
Swap file (Pizazz Plus) 
.QAD
Document (PF QuickArt) 
.QAG
Quick Access Group data file (Norton Desktop) 
.QAP
Application file (Omnis Quartz) 
.QBE
Saved query (dBase IV) 
.QBE
Saved Query (Quattro Pro) 
.QBO
Compiled query (dBase IV) 
.QBS
Program file (Microsoft QuickBasic) 
.QBW
Spreadsheet data (QuickBooks for Windows) 
.QCP
Voice file (Qualcomm Pure Voice) 
.QD0
Data file-segment 10 (Omnis Quartz) 
.QD1
Data file segment 1 (Omnis Quartz) 
.QD2
Data file segment 2 (Omnis Quartz) 
.QD3
Data file segment 3 (Omnis Quartz) 
.QD3D
QuickDraw 3D Metafile (Apple) 
.QD4
Data file segment 4 (Omnis Quartz) 
.QD5
Data file segment 5 (Omnis Quartz) 
.QD6
Data file segment 6 (Omnis Quartz) 
.QD7
Data file segmnet 7 (Omnis Quartz) 
.QD8
Data file segment 8 (Omnis Quartz) 
.QD9
Data file segment 9 (Omnis Quartz) 
.QDF
Data file (Quicken) 
.QDK
Backup of startup files (QEMM) 
.QDT
Data file from the Quicken UK Accountancy/Tax/Invoice program (QuickBooks) 
.QDV
Graphics file (Steve Blackstock Giffer) 
.QEF
Query file (Microsoft Excel) 
.QEL
Electronic library file (Quicken) 
.QFL
Document (FAMILY LAWYER) 
.QFX
Fax (QuickLink) 
.QIC
Backup file (Microsoft) 
.QIF
Image (MIME)(QuickTime) 
.QIF
Import file (Quicken) 
.QLB
Library file (Microsoft C/C++) 
.QLB
Library file (Quick) 
.QLC
Data (PostScript help file) 
.QLP
Printer driver (QuickLink) 
.QM
Motion file (Quality) 
.QM4
Option or services file (QMail 4.x Mail Door) 
.QPR
Generated query program (Microsoft FoxPro) 
.QPR
Print queue device driver (OS/2) 
.QPX
Compiled query program (Microsoft FoxPro) 
.QQT
Qardware definition file (Quick Qard Technology) 
.QRP
Report builder file (Centura) 
.QRP
Report file (Liberty for Windows 2.0) 
.QRS
Equation Editor support file (WordPerfect for Windows) 
.QRT
QRT graphics file (Ray Tracer) 
.QRY
Query (dBase IV) 
.QRY
Query (Microsoft) 
.QSD
Datafile (Quicken) 
.QST
Tab file (Quake Spy) 
.QT
Movie file (QuickTime) 
.QTI
Image file (QuickTime) 
.QTIF
Image file (QuickTime) 
.QTM
Movie file (QuickTime) 
.QTP
Preferences file (QuickTime) 
.QTS
Image file (QuickTime) 
.QTS
PICT image file (Macintosh) 
.QTX
Image file (QuickTime) 
.QW
Write program file (Symantec Q&A) 
.QWK
Message file (QWK Reader) 
.QXD
Data file (Quark Xpress) 
.QXL
Element library (Quark Xpress) 
.QXT
Template file (Quark Xpress) 
.R
Ratfor file (FORTRAN Preprocessor) 
.R
Resource file (Pegasus Mail) 
.R8
Raw graphics (One byte per pixel) plane one (PicLab) 
.R8P
Pcl 4 bitmap font (Intellifont) 
.RA
Sound file (RealAudio) 
.RAD
Radar data file (Radar ViewPoint) 
.RAM
Metafile (RealAudio) 
.RAO
ReadAllOver (YOUniverse) 
.RAR
RAR compressed archive (Eugene Roshall's format) 
.RAS
Bitmap (Sun Raster Images) 
.RAT
Datafile (RATS) 
.RAW
Raw File Format (bitmap) 
.RAW
Raw signed PCM data 
.RAW
Raw signed PCM data 
.RBF
Datafile (Rbase) 
.RBH
Maintained by RoboHELP, the RBH file adds to the information contained in the Help project file 
.RC
Configuration file (emacs) 
.RC
Resource script (Borland C++) 
.RC
Resource script (Micosoft C/C++) 
.RCG
Newsgroup file (Netscape) 
.RD1
Registered level file (Descent1) 
.RDF
Compiled UIC source code (Geoworks UI Compiler) 
.RDF
Research document information format 
.RDF
Resource Description Framework file (related to XML <http://searchWebServices.techtarget.com/sDefinition/0,,sid26_gci213404,00.html> and metadata <http://searchDatabase.techtarget.com/sDefinition/0,,sid13_gci212555,00.html>) 
.RDI
Device-independent bitmap file 
.RDL
Registered Level file (Descent) 
.RDX
Datafile (Reflex) 
.REC
Datafile (EpiInfo) 
.REC
Record file (Sprint) 
.REC
Recorded macro (Microsoft Windows 3.x) 
.REC
Voice file (RapidComm) 
.RED
Path information file (Clarion Modula-2) 
.REF
Reference file (Generic) 
.REG
OLE registration file (Microsoft Windows 3.x) 
.REG
Registration file (Corel) 
.REG
Registration file 
.related
data files for multiple users of a small-scale PC application 
.REM
Remarks file (Generic) 
.REP
Reply file (QWK Reader) 
.REP
Report file (CodeReporter) 
.REP
Report file (DataBoss) 
.REP
Report file (Report Designer) 
.REP
Report file (Visual dBase) 
.REQ
Request file (Generic) 
.RES
Compiled resource file (Borland C++) 
.RES
Resource file (dBase IV) 
.RES
Resource file (Microsoft Visual C++) 
.REV
Revision file (GeoWorks) 
.REX
Report definition (Oracle) 
.REX
Source code file (REXX) 
.REZ
Resource file (Generic) 
.RF
Raster graphics file (Sun) 
.RFT
Revisable Form Text (part of IBM's DCA or Document Content Architecture) 
.RGB,SGI
RGB files (Silicon Graphics) 
.RGX
Symbol tables (ReaGeniX code generator) 
.RH
Resource header file (Borland C++ 4.5) 
.RI
Data file (Lotus 1-2-3) 
.RIB
Graphics in Renderman format (3DReality) 
.RIC
Fax document (Ricoh) 
.RIF
Image file (Metacreations Painter 5) 
.RIF
RIFF bitmap graphics (Fractal Design Painter) 
.RIP
Graphics (remote access) 
.RIX
Bitmap graphics (ColorRIX VGA Paint) 
.RL1
Regestered level file (Descent1) 
.RL2
Registered level file (Descent2) 
.RL4
Bitmap graphics file 
.RL8
Bitmap graphics file 
.RLA
Wavefront raster image (SDSC Image Tool) 
.RLB
Data file (Harvard Graphics Win 9.x) 
.RLC
Graphics file (1 bit per pixel scanner output file) 
.RLE
Run-Length Encoded bitmap (SDSC Image Tool) 
.RLZ
Realizer source code file (CA-Realizer) 
.RM
Video file (RealAudio) 
.RMD
Document (Microsoft RegMaid) 
.RMF
Rich Map Format (used by 3-D game editors to store a map) 
.RMF
Rich music format (Beatnik) 
.RMI
MIDI music 
.RMK
Makefile (Clipper RMake) 
.RN
Xpl Program file (Nota Bene) 
.RND
Rendering slide (AutoCAD-AutoShade) 
.RNO
Runoff file (VAX) 
.ROL
FM music Adlib Music file (Roland) 
.ROM
Cartridge-based home video game emulator file (exact copy of ROM contents in cartridges from Atari 2600, Colecovision, Sega, Nintendo, etc.; not interchangeable between emulators) 
.ROV
Data file (Rescue Rover) 
.RPD
Database (RapidFire) 
.RPL
Text document (Replica) 
.RPL
Video file (Tomb Raider) 
.RPM
Package Manager (RedHat Linux) 
.rpm
RedHat Package Manager rpm file. 
.RPT
Crystal Reports file ( and a sub-set of Microsoft Visual Basic) 
.RRS
Saved game file (Ace Road Rash) 
.RS
Datafile (Amiga Resource Reassembler) 
.RSB
Red Storm bitmap (Rainbow 6 (Game) and several image editing programs) 
.RSC
Resource file (Generic) 
.RSL
Paradox 7 reports (Broderland) 
.RSM
Resume file (WinWay Resume Writer) 
.RSP
Response file (Generic) 
.RS_
Resourse fork file (Macintosh Mac-ette) 
.RTF
<http://searchExchange.techtarget.com/sDefinition/0,,sid43_gci214276,00.html> Rich Text Format document 
.RTF
Help file script (Microsoft Windows 9.x) 
.RTK
Used by RoboHELP to simulate the search feature of Windows help 
.RTL
Run Time library (NU 7.0) 
.RTL
Text file (Generic) 
.RTM
Music module (MOD) (Real Tracker) 
.RTP
Software update package data file (RTpatch) 
.RTS
RoboHELP to speed complex operations 
.RTS
RTSL document (RealAudio) 
.RTS
Runtime library file (CA-Realizer) 
.RUL
Extension used in InstallShield 
.RUN
Compiled output p-code file (Softworks basic compiler) (SoftworksLtd) 
.RVP
Scan Configuration file (MIME) (Microsoft) 
.RVW
Review file (Generic) 
.RWS
Resource Workshop data file (Borland C++) 
.RWX
Script file (RenderWare) 
.RXX
RAR compressed files from a multi-volume archive (xx = a number from 01 to 99) 
.S
Assembler source code (Unix) 
.S
Source code file (Scheme) 
.S$$
Temporary sort file (Sprint) 
.S3I
Instrument file (Scream Tracker v 3.0) 
.S3M
16 channel music file (Scream Tracker v 3.0) 
.SAI
Encrypted video file (Integrated Sensors) 
.SAL
Datafile (SORITEC) 
.SAM
Document (AMI Professional) 
.SAM
Signed 8bit sample data file 
.SAR
Compressed archive (SAR) 
.SAV
Backup file (Generic) 
.SAV
Configuration file (Generic) 
.SAV
Saved game file (Generic) 
.SB
Raw Signed Byte (8bit) audio data 
.SB!
Locking file (Superbase) 
.SBD
Data definition file (Superbase) 
.SBD
Storyboard data file (Storyboard Editor) 
.SBF
File data (Superbase) 
.SBI
Instrument file (Creative Labs SoundBlaster) 
.SBK
Bank file (Soundblaster)/EMU SoundFont v1.x (Creative Labs Soundfont 1.0) 
.SBL
Flash object (ShockWave) 
.SBP
Dml program file (Superbase 4) 
.SBP
Program file (Superbase) 
.SBQ
Query definition file (Superbase) 
.SBR
Support file (Source Browser) 
.SBT
Notes related to record data (Superbase 4 for Windows) 
.SBV
Form definition file (Superbase) 
.SC
Display driver (Framework II) 
.SC
Pal script (Paradox) 
.SC2
SAS catalog (Windows 95/NT, OS/2, Mac) 
.SC2
Schedule+ 7.0 file (Microsoft) 
.SC3
Renamed dBase III screen mask file (dBase IV) 
.SC3
Saved game file (SIMM City 3000) 
.SC3
Screen device driver (Harvard Graphics 3.0) 
.SC4
Level file (Roller Coaster Tycoon) 
.SCA
Datafile (SCA) 
.SCC
Source Safe file (Microsoft) 
.SCC
Text file (Generic) 
.SCD
Datafile (Microsoft Schedule+ 7.0) 
.SCD
Object description language graphics (Scodl Scan Conversion) 
.SCD
Slide image (Matrix/Imapro SCODL) 
.SCF
Command file (Microsoft Windows Explorer) 
.SCF
Multimedia show (ScoreMaker) 
.SCF
Spell checker configuration file (Symphony) 
.SCH
Datafile (Microsoft Schedule+ 7.0) 
.SCH
Schematics file (ORCAD) 
.SCI
Fax document (SciFAX) 
.SCI
Inspire native format (ScanVec) 
.SCI
System configuration information file (Generic) 
.SCM
Scheme source code file (Generic) 
.SCM
Video game console ROM emulater file 
.SCN
Scene data file (TrueSpace2) 
.SCN
Screen file (Kermit) 
.SCO
High score file (Generic game file) 
.SCP
Dial-Up Networking Script 
.SCP
Script file (BITCOM) 
.SCR
Debug source code (DOS Debug) 
.SCR
Fax image (Generic) 
.SCR
Screen font file (LocoScript) 
.SCR
Screen snapshot file (dBase IV) 
.SCR
Screen snapshot file (Procomm Plus) 
.SCR
Screensaver file (Microsoft Windows 9.x) 
.SCT
CT bitmap (Scitex) 
.SCT
FoxPro forms (Microsoft) 
.SCT
SAS catalog (Dos) 
.SCT01
SAS catalog (Unix) 
.SCV
CASmate Native format (ScanVec) 
.SCX
Bitmap graphics (ColorRIX) 
.SCX
Chart (Stanford Chart) 
.SCX
FoxPro forms (Microsoft) 
.SCX
Screen file (Microsoft FoxPro) 
.SCY
Security file (ReaGeniX) 
.SD
Audio (Sound Designer I) 
.SD2
Flattened file/data fork (Sound Designer II) 
.SD2
SAS database (Windows 95/NT OS/2, Mac) 
.SDA
File archive description (Fidonet Software Distribution Network) 
.SDC
Spreadsheet (Staroffice)(StarCalc) 
.SDD
Presentation file (Staroffice)(Starimpress) 
.SDF
System Data File Format - legacy Unisys (Sperry) format 
.SDI
Software distribution network information file 
.SDK
Floppy disk image (Roland) 
.SDL
Library file (SmartDraw) 
.SDN
Software distribution network compressed archive 
.SDP
Datafile (Cocreate SolidDesigner) 
.SDPC
Datafile (Cocreate SolidDesigner) 
.SDR
Drawing (SmartDraw) 
.SDS
Raw Midi Sample Dump Standard file 
.SDT
Template (SmartDraw) 
.SDV
Semicolon Divided Values file 
.SDW
Graphic file (Lotus WordPro) 
.SDW
Raw Signed DWord (32bit) data 
.SDX
Midi Sample Dump Standard files compacted by SDX 
.SEA
Self-expanding archive (used by Stuffit for Mac files and possibly by others) 
.SEC
Secret key ring file (PGP) 
.SEC
Secured animation file (Disney Animation Studio) 
.SED
Screen editor script files (SED) 
.SEL
Data file (Copy Books) 
.SEP
Printer seperator page (Generic) 
.SEP
Tagged Image File Format (TIFF) bitmap 
.SEQ
Animation file (Atari) 
.SEQ
Sequential instruction file (Bubble Chamber) 
.SES
Session file (Cool Edit) (common digital audio editor file ) 
.SES
Session information file (Clarion Modula-2) 
.SESSION
Internet Security Scanner file (ISS) 
.SET
Configuration file (1st Reader) 
.SET
Install driver sets (Symphony) 
.SET
Setup option file (Generic) 
.SET
Voice set files (Quartet) 
.SEW
Sewing program file (Generic) 
.SF
SoundFile format (IrCam) 
.SF
Wps attribute storage file (OS/2 WorkPlace Shell) 
.SF2
Bank file (Creative Labs Soundfont 2.0)(Soundblaster) 
.SF2
SoundFont file (EMU version 2.0) 
.SFD
Sound File Data (SoundStage) 
.SFI
Graphics file (SIS Framegrabber) 
.SFI
Printer font file (Hewlett-Packard Laser Jet Landscape) 
.SFI
Printer font file (Ventura Publisher) 
.SFI
Sound File Info (SoundStage) 
.SFK
Sound file (Sonic Foundry) 
.SFL
Pcl 4 bitmap font (Intellifont) 
.SFL
Pcl 4 bitmap font (LandScape) 
.SFL
Pcl 4 bitmap font (Ventura Publisher) 
.SFN
Font file (SPX) 
.SFP
Pcl bitmap font (Intellifont) 
.SFP
Pcl bitmap font (Portrait) 
.SFP
Pcl bitmap font (Ventura Publisher) 
.SFR
Sample Resource (Sonic Foundry) 
.SFS
Pcl 5 scalable font file (Intellifont) 
.SFT
Screen font (ChiWriter) 
.SFW
Mangled JPEG (Seattle Filmworks) 
.SFX
Self-extracting archive (RAR) 
.SG
Image file (SnapGraphix) 
.SG1
Graphics file (Stanford Graphics) 
.SGF
Document w/graphics (StarWriter) 
.SGF
Graphics file (Sonique) 
.SGI
Graphics file (IRIS) 
.SGI
Graphics file (Silicon Graphics) 
.SGML
Standard Generalized Markup Language 
.sgml
Standard Generalized Markup Language. Used to create documents to be converted to many different formats. 
.SGP
Statistics file (STATGRAPHICS Plus) 
.SGT
Save/Get keyboard macro (Signature) 
.SH
ASCii archive (Unix/SHAR) 
.sh
sh shell script.  It can be interpreted by any Bourne compatible shell.
.SH
Shell script (Unix) 
.SH3
Presentaion file (Harvard Graphics) 
.SHB
Document shortcut file 
.SHB
Presentation (Corel Show) 
.SHG
Bitmap (HotSpot) 
.SHK
Compressed Apple archive (SHRINKIT) 
.SHK
Compressed archive (Arthurian Shrink Archiver) 
.SHM
Shell macro (WordPerfect for Windows Library) 
.SHN
Audio compression file (Shorten) 
.SHP
DOS shapes file (3D Studios) 
.SHP
File format used by some programs for 3D modeling of multipart interactive triangle models 
.SHP
Shapefile spatial data format (used by many GIS programs) 
.SHP
Source code and shape file for text fonts (AutoCAD) 
.SHR
File archive (Unix ASCii) (SHAR) 
.SHS
Shell scrap file; reportedly used to send "password stealers" 
.SHTML
HTML file containing Server Side Includes (SSI) 
.SHW
Presentation (Corel Show) 
.SHW
Presentation (Harvard Graphics 2.0) 
.SHW
Slide Show (WordPerfect for Windows) 
.SHX
Shape entities (AutoCAD) 
.SHX
Shapefile spatial index file (ArcView) 
.SIF
Setup installation files (Microsoft Windows NT) 
.SIG
Current program settings (Signature) 
.SIG
Signature file (PopMail) 
.SIK
Backup files (Microsoft Word for Windows) 
.SIK
Backup files (Sicherungskopie) 
.SIT
Compressed archive of Mac files (Stuffit) 
.SIZ
Configuration file (Oracle 7) 
.SKA
Secret Keyring file (PGP) 
.SKF
Drawing file (AutoSketch) 
.SKL
Resource file (Macromedia Director) 
.SL
Save Layout extension (PACT) 
.SL
Source code file (S-Lang) 
.SLB
Slide Library File (AutoCAD) 
.SLC
Compiled SALT script (Telix) 
.SLD
Slide File (AutoCAD) 
.SLI
Slide file (MAGICorp Slide Service) 
.SLK
Symbolic link spreadsheet (SLYK) 
.SLL
Sound data file (Generic) 
.SLT
Script application language (SALT) (Telix script source) 
.SM
Maillist (SoftSpoken Mailer) 
.SM
Script file (ScriptMaker) 
.SM
Source code file (Smalltalk) 
.SM
Text file (Samna Word) 
.SM3
Symbol file (DataCAD) 
.SMD
Video game console ROM emulator file 
.SMF
Fax document (SMARTFAX) 
.SMK
Image file (Deer's Revenge) 
.SMK
Image file (Nascar Racing '99) 
.SMK
Image file (Smack Player) 
.SMM
Macro (AMI Pro) 
.SMP
Sample file (AdLib Gold) 
.SMP
Samplevision format 
.SMS
Emulator ROM image file (8-bit Sega Master System) 
.SMT
SmartObject file (IconAuthor) 
.SMT
Text file (Smart Ware II) 
.SND
Raw unsigned PCM data 
.SND
Sample (AKAI MPC) 
.SND
Sound file (NeXt) 
.SND
Sound resource (Macintosh) 
.SNDR
Sound file (Sounder) 
.SNDT
Sound file (SndTool) 
.SNG
Midi song file (Midisoft Studio) 
.SNG
Midi song file (Prism) 
.SNM
Mailbox (mail folder) index (Netscape) 
.SNO
Source code file (Snobol4) 
.SNP
Output video file (Computer Eyes) 
.SO
Shared library file (Unix)(equivalent to a Windows DLL) 
.so
Shared object file. lib*.so is a Dynamically Linked Library. [Executable program code shared by more than one program to save disk space and memory.] 
.SOL
Solution file (Common used with game examples,tutorials) 
.SOM
Network serial numbers (Quattro Pro) 
.SOM
Sort information files (Paradox) 
.SON
Song file (Creative Labs SoundBlaster Studio II) 
.SOU
Sound file (Creative Labs SoundBlaster Studio) 
.SP
Compressed archive for Unix (Sprint) 
.SP4
Saved game (Roller Coaster Tycoon) 
.SPC
Program file (Microsoft MultiPlan) 
.SPC
Temporary file (WordPerfect for Windows) 
.SPD
Data file (Speech) 
.SPD
Scalable font (Harvard Graphics 3.0) 
.SPD
Scalable font (Speedo) 
.spd
Speedo X Window System font file. 
.SPF
Slide presentation file (EnerGraphics) 
.SPG
Glossary file (Sprint) 
.SPI
Graphics file (Phillips Scanner) 
.SPI
Graphics file (Siemens Scanner) 
.SPL
Compressed archive (SPLINT) 
.SPL
Customized printer driver (Sprint) 
.SPL
Object file (ShockWave Flash) 
.SPL
Personal spell dictionary (Signature) 
.SPL
Printer spool file (Microsoft Windows 3.x) 
.SPL
Sample file (DigiTracker) 
.SPL
Sample file (Generic) 
.SPM
Data file (WordPerfect for Windows) 
.SPP
Printer file (Sprint) 
.SPPACK
Sound sample (SP Pack) 
.SPR
Document letter (Sprint) 
.SPR
Generated screen program (Microsoft FoxPro) 
.SPR
Sprite (Image layering and resizing) 
.SPRITE
Bitmap file (Acorn) 
.SPS
Screen driver (Sprint) 
.SPS
Spssx source code file (VAX/VMS) 
.SPT
Source code file (Spitbol) 
.SPT
Support file (MITAC disk/system management utility package) 
.SPU
Picture file (Spectrum 512) 
.SPW
Worksheet (SigmaPlot) 
.SPX
Compiled screen program (Microsoft FoxPro) 
.SQC
Structured Query Language (SQL) common code file 
.SQL
Generally used by database products as an extension for SQL queries (scripts, text, or binary) 
.SQL
SQL queries (Informix) 
.SQP
Query result of audio search (Sonique) 
.SQR
Structured Query Language (SQL) program file 
.SQZ
Compressed archive (SQUEEZE) 
.src.rpm
Source RPM file. A 'tarball' that can be recompiled and installed which also allows RPM based systems to manage them. From Binh
.SRE
Undefined file (Motorola) 
.SRF
Raster graphics file (Sun) 
.SRM
Video game console ROM emulator file 
.SRP
SCript file (QuickLink) 
.SRZ
Source file (DataFlex) 
.SS
Bitmap graphics (Splash) 
.SSA
Video file (Sub Station Alpha) 
.SSD
Datafile (SAS/PC) 
.SSD
SAS database (Dos) 
.SSD01
SAS data sets (Unix) 
.SSF
Spreadsheet file (Enable) 
.SSP
Datafile (SAS Transport) 
.ST
Disk Image file (Atari) 
.ST
Instrument library (Scream Tracker) 
.ST
Source code file (Little SmallTalk) 
.ST
Stamp file (NeoPaint) 
.STA
Saved state (Reflection 4.0) 
.STA
Stack file (SpinMaker Plus) 
.STB
Stub library (Genus GX Kernel) 
.STD
Standard script file (LocoScript) 
.STD
State transition diagram graphic file (Prosa) 
.STF
Compressed archive (SHRINKTOFIT) 
.STL
Stereolithography file 
.STM
Music file (Scream Tracker) 
.STM
Music module (MOD) (Scream Tracker 2) 
.STM
Shorter suffix for .shtml, an HTML file containing a server side include (SSI <http://WhatIs.techtarget.com/definition/0,,sid9_gci214225,00.html>) 
.STM
State transition diagram model file (Prosa) 
.STO
Pascal stub OBJ file (Genus GX Kernel) 
.STQ
Text file (Statistica) (StatSoft Software) 
.STR
Screensaver file 
.STR
Structure list OBJ file (dBase IV Application Generator) 
.STS
Project status information file (Microsoft C/C++) 
.STS
Song file (Music) (Scream Tracker) 
.STW
Data file (SmartTerm for Windows) 
.STX
Electronic book file (SmarText) 
.STX
Tax form (CA-Simply Tax) 
.STY
Style sheet (Generic text and graphics programs0 
.STY
Style sheet (Ventura Publisher) 
.SUI
Suit library (Simple User Interface Toolkit) 
.SUM
Summary file (Generic) 
.SUN
Rasterfile graphics (Sun) 
.SUP
Supplementary dictionary files (WordPerfect for Windows) 
.SVD
Autosave file for document (WordPerfect for Windows) 
.SVF
Simple Vector Format 2D image (Microstation) 
.SVG
Autosave file for glossary (WordPerfect for Windows) 
.SVG
Scalable vector graphics file (Adobe) 
.SVP
Graphics file (Sonique) 
.SVS
Autosave file for style sheet (WordPerfect for Windows) 
.SVX
Interchange file format, 8SVX/16SV 
.SVX
Sound file (Amiga 8SVX) 
.SVY
Database file (SAVVY/PC) 
.SW
Raw signed Word (16bit) data 
.SWA
Shockwave audio file in Macromedia Director (an MP3 file) 
.SWF
Object (ShockWave Flash) 
.SWG
Swag Packet file (SWAG Reader) 
.SWP
Document backup file (Sprint) 
.SWP
Swap file (DataCAD) 
.SWP
Swap file (DOS) 
.SY1
Smartpix symbol library (Ami Pro) 
.SY3
Symbol file (Harvard Graphics 2.0) 
.SYD
Backup of startup files (QEMM) 
.SYM
Precompiled header file (Borland C++) 
.SYM
Program symbol table (Generic to compilers) 
.SYM
Symbol file (Harvard Graphics 2.0) 
.SYN
SDSC Synu image file (SDSC Image Tool) 
.SYN
Synonym file (Microsoft Word 5.0) 
.SYS
Datafile (SPSS/PC) 
.SYS
Datafile (SYGRAPH) 
.SYS
Datafile (SYSTAT) 
.SYS
System file (Generic) 
.SYS
System file Device driver or hardware configuration file 
.SYW
Graphics symbols (Harvard Graphics) 
.SYW
Wave file (Yamaha SV-series) 
.T
Source file (TADS) 
.T
Tape archive (TAR) (Without compression) 
.T
Tester symbol file (ReaGeniX code generator) 
.T2T
Modeling software file (Sonata CAD) 
.T44
Temporary file for sorting index (dBase IV) 
.T64
Emulator tape image file (Commodore 64) 
.TAB
Guitar Tablature file 
.TAB
Table file (MapInfo GIS) 
.Tag
image bitmap file (TIFF) 
.TAG
Query tag name file (DataFlex) 
.TAH
Turbo assembler help file (Borland C++) 
.TAL
Text illustration file (TypeAlign) 
.TAR
<http://searchEnterpriseLinux.techtarget.com/sDefinition/0,,sid39_gci213093,00.html> Tape Archive 
.TAR
Compressed archive (TAR) 
.tar
tarred directory tree. 
.tar.gz
See tarball. From Binh
.TAZ
Compressed ASCII archive (COMPRESS) 
.TAZ
Compressed ASCII archive (TAR) 
.TAZ
Gzip/Tape archive (Unix) 
.TB1
Font file (Borland Turbo C) 
.TB2
Font file (Borland Turbo C) 
.TBF
Fax document (Imavox TurboFax) 
.TBK
Interactive multimedia files (Asymetrix Toolbook) 
.TBK
Memo backup file (dBase IV) 
.TBK
Memo backup file (Microsoft FoxPro) 
.TBK
Toolbook file (Asymetrix Toolbook) 
.TBL
Graphics (Native format) (Pagemaker TableEditor) 
.TBL
Table of values (OS/2) 
.TBS
Text elements (Microsoft Word for Windows) 
.TBX
Table (Project Scheduler 4) 
.TC
Configuration file (Borland C++) 
.TC
Configuration file (Turbo C) 
.TCH
Turbo C Help file (Borland C++) 
.TCL
Script in the TCL/TK Language 
.tcl
Tcl/Tk source code (programming language). 
.TCW
Drawing file (TurboCAD for Windows) 
.TD
Configuration file (Turbo Debugger for DOS) 
.TD0
Disk image file (Teledisk) 
.TD2
Configuration file (Turbo Debugger for WIN32) 
.TD4
Saved track design (Roller Coaster Tycoon) 
.TDB
Database file (TACT) 
.TDB
Database file (Thumbs Plus) 
.TDDD
A file format use by the Imagine & Turbo Silver ray-tracers 
.TDF
Font file (TheDraw) 
.TDF
Typeface definition file (Speedo) 
.TDH
Help file (Turbo Debugger0 
.TDK
Keystroke recording file (Turbo Debugger) 
.TDS
Symbol table (Turbo Debugger) 
.TDW
Configuration file (Turbo Debugger for Windows) 
.TEF
Fax document (Relisys TEFAX) 
.TEL
Hostfile (Telnet) 
.TEM
Input template (IconAuthor) 
.TEM
Turbo Editor Macro Language script (Borland C++) 
.TEX
Datasheet file (Idealist) 
.tex
TEX or LATEX document. LATEX is for document processing and typesetting. 
.TEX
TEX text file (Scientific Word) 
.TEX
Texture file 
.texi, .texinfo
Texinfo source. Info pages are compiled from these. 
.TF
Configuration file (Turbo Profiler) 
.TFA
Area file (Turbo Profiler) 
.TFC
Catalogue file (Tobi's Floppy Disk Cataloguer) 
.TFH
Help file (Turbo Profiler) 
.TFM
Form file (Form Tool Gold) 
.tfm
LATEX font metric file. 
.TFM
Tagged font metric file (TeX) 
.TFM
TeX font metrics file (TeX) 
.TFS
Statistics file (Turbo Profiler) 
.TG1
Project file (On Target) 
.TGA
Targa bitmap (Adobe Acrobat,TrueVision) 
.TGA
Targa bitmap (Countour Mortgage Loan Format) 
.tga
TARGA image file. 
.TGA
Winpoint Loan file (Microsoft Excel) 
.TGQ
Movie file (Dungeon Keeper 2) (Bullfrog Software) 
.TGV
Video file (Electronic Arts) (Need for Speed I/II/III, NBA '96) 
.tgz
Directory tree that has been archived with tar, and then compressed with gzip. Also a package for the Slackware distribution. 
.TGZ
Gzip/Tape archive (Unix) 
.THEME
Desktop theme (Microsoft Windows 9.x) 
.THM
Thumbnail image file (Microsoft Clip Gallery v.1.x) 
.THN
Thumbnail (Graphics Workshop for Windows) 
.THS
Thesaurus dictionary (WordPerfect for Windows) 
.TIF
Tag image bitmap file (TIFF) 
.TIFF
<http://WhatIs.techtarget.com/definition/0,,sid9_gci214180,00.html> 
.tiff
TIFF image file. 
.TIG
Map file (Tiger) (Used by the US Government to distribute Map files) 
.TIL
Fuzzy Logic knowledge base file (Togai InfraLogic Fuzzy-C Compiler) 
.TIM
Texture/Image file (Playstation) 
.TIS
Tile set (MahJongg 3.0) 
.TJF
backup files (VAXTPU Editor) 
.TLB
OLE type library files (Microsoft) 
.TLB
Reference table (Bubble Editor) 
.TLB
Text library (VAX) 
.TLB
Type library (Visual C++) 
.TLC
Compiled tool command language source code file (Swat) 
.TLE
Two-Line element set (NASA) 
.TLP
Project timeline file (Microsoft Project) 
.TLX
Data file (Trellix) 
.TMF
Tagged font metric file (WordPerfect for Windows) 
.TMO
Ztg global optimizer default optimizer file (Zortech C++) 
.TMP
Temporary file (Microsoft Windows) (ALL) 
.TMS
Script file (Telemate) 
.TNV
Data file (BitWare) 
.TOC
Table of contents file (Eudora Mailbox) 
.TOL
Image file (Kodak Photo Enhancer) 
.TOS
Self-Extracting archive (Atari ST) 
.TOS
The Operation System for Atari line of 16/32 and 32/32 computers 
.TP
Configuration file (Turbo Pascal) 
.TP
Sesson-state file (Turbo Profiler) 
.TP3
Template file (Harvard Graphics) 
.TP4
Saved picture file (Roller Coaster Tycoon) 
.TPB
Downloadable PCL Soft font file backup (HiJaak) 
.TPF
Downloadable PCL Soft font file (HiJaak) 
.TPH
Help file (Turbo Pascal) 
.TPL
Encrypted lesson file (TutorPro) 
.TPL
Residents units library (Turbo Pascal) 
.TPL
Template file ( Cakewalk Audio) 
.TPL
Template file (DataCAD) 
.TPL
Template file (Harvard Graphics 2.0) 
.TPP
Project file (Teleport Pro) 
.TPP
Protected mode units (Borland Pascal 7.0) 
.TPU
Command file (VAXTPU Editor) 
.TPU
Turbo Pascal Unit (Turbo Pascal)(BGI) 
.TPV
Packed graphics file (TutorPro) 
.TPW
Packed wave files (TutorPro) 
.TPW
Session-state file (Turbo Profiler for Microsoft Windows) 
.TPW
Turbo Pascal Unit (BGI) (Turbo Pascal for Windows 9.x) 
.TPX
Image file (ULead Photo Express) 
.TPZ
Compressed archive (GNUzip) 
.TPZ
Compressed archive (TAR) 
.TR
Session-state settings (Turbo Charge Debugger for DOS) 
.TR2
Session-state settings (Turbo Charge Debugger for Win32) 
.TRA
Saved game file (Coaster) 
.TRC
Debug support file (Power CTrace) 
.TRE
Directory tree file (PC-Tools) 
.TRK
Script file (Kermit) 
.TRM
Terminal file (Generic) 
.TRM
Terminal settings file (Microsoft Windows 3.x) 
.TRN
Project usage log (MKS Source Integrity) 
.TRN
Translation support file (Quattro Pro) 
.TRS
Executable file (MicroGraphix) 
.TRW
Session-state settings (Turbo Debugger for Windows) 
.TST
Printer test file (WordPerfect for Windows) 
.TTF
TrueType font (Generic) 
.ttf
Truetype font. 
.TTK
Translation tool kit file (Corel Catalyst) 
.TTO
Client access data specification file (AS/400) (Server to Client) 
.TUV
Tutorial file (Many programs use this suffix for their tutorials) (Generic) 
.TV
Table view settings (Paradox) 
.TV1
Overflow file above insert point in document 1 (WordPerfect for Windows) 
.TV2
Overflow file above insert point in document 2 (WordPerfect for Windows) 
.TV3
Overflow file above insert point in document 3 (WordPerfect for Windows) 
.TV4
Overflow file above insert point in document 4 (WordPerfect for Windows) 
.TV5
Overflow file above insert point in document 5 (WordPerfect for Windows) 
.TV6
Overflow file above insert point in document 6 (WordPerfect for Windows) 
.TV7
Overflow file above insert point in document 7 (WordPerfect for Windows) 
.TV8
Overflow file above insert point in document 8 (WordPerfect for Windows) 
.TV9
Overflow file above insert point in document 9 (WordPerfect for Windows) 
.TVF
Table view settings (dBase IV) 
.TWF
Data file (TABWorks) 
.TWW
Template file (TagWrite) 
.TX8
MS-DOS text 
.TXB
Encoded briefing file (Descent/D2) 
.TXF
Compressed archive (FREEZE) 
.TXF
Compressed archive (TAR) 
.TXF
Tax exchange format (Quicken and others) 
.TXI
Support file (TeX) 
.TXT
ASCII <http://WhatIs.techtarget.com/definition/0,,sid9_gci211600,00.html> text-formatted data 
.txt
Plain English text file. 
.TXW
Wave file (Yamaha TX16W) 
.TYM
Time Stamp files (PageMaker 4.0) 
.TZ
Old compression file (TAR), (COMPRESS) 
.TZB
Compressed archive (Tar) 
.UAP
User agent profile (Used by wireless telephony applications) 
.UB
Raw unsigned byte (8-bit) data 
.UC2
Compressed archive (UltraCompressor II) 
.UCN
New compressed archive (UltraCompressor II) 
.UDF
Image filter (Photostyler) 
.UDF
Unique Database (Microsoft Windows NT) 
.UDW
Raw unsigned doubleword (32-bit) data 
.UE2
Encrypted archive (UltraCompressor II) 
.UFO
Object file (Ulead) 
.UG
Drawing file (AutoCAD and others) 
.UHS
Binary file (Universal Hint System) 
.UI
Espire source code (Geoworks UI Compiler) 
.UI
User interface file (Sprint) 
.UIF
Long prompts for Microsoft Windows (WordPerfect for Windows) 
.UIH
Espire header file (Geoworks UI Compiler) 
.UL
Audio file (ULAW) 
.ULAW
(CCITT G.711) audio (US Telephony) 
.ULD
Uploaded file information (Procomm Plus) 
.ULT
Music module (MOD) (UltraTracker) 
.UMB
Backup file (archive) (MemMaker) 
.UNI
Datafile (Forcast Pro) 
.UNI
UniMod music module (MOD) (MikMod) 
.UNX
Text file (Unix specific information) 
.UPD
Updated program data (dBase) 
.UPD
Updated program data (Generic) 
.UPI
Program file (ULead Photo Impact) 
.UPO
Compiled updated datafile (dBase) 
.UPX
Saved Image file (ULead Photo Express) 
.URF
Universal radar format (Radar ViewPoint) 
.URL
Internet shortcut file (Universal Resource Locator) 
.USE
Source Integrity file (MKS) 
.USP
Printer font w/updated USACII extended character set (Pagemaker) 
.USR
Audit trail file (Pro/Engineer) 
.USR
User database file (Procomm Plus) 
.USR
User database file (Tour) 
.USR
User database file (Turbo C++) 
.UU
Compressed ASCII archive (UUDE/ENCODE) 
.UU
UU-encoded file 
.UUE
Executable compressed ASCII archive (UUDE/ENCODE) 
.UUE
UU-encoded file 
.UW
Raw unsigned 16-bit) datafile (Word) 
.UWF
Wave file (UltraTracker) 
.V
Consistency check support file (ReaGeniX Code Generator) 
.V
Main image input file (Vivid 2.0) 
.V8
8-bit audio file (CoVox) 
.VAL
Asset management document (Milliplex OmniValue) 
.VAL
Validity checks/referential integrity checks (Paradox for Windows) 
.VAL
Values list object file (dBase Application Generator) 
.VAN
Animation file (VistaPro) 
.VAP
Annotated speech file (Generic) 
.VAR
ASCII text file for data dictionary (Sterling Software Groundworks, COOL Business Team Enterprise Model) 
.VAR
Variable file (IconAuthor) 
.VBA
VBase file 
.VBP
Project file (Microsoft Visual Basic) 
.VBR
Remote automated registration file (Microsoft Visual Basic) 
.VBS
Script file (Microsoft Visual Basic) 
.VBW
Workspace file (Microsoft Visual Basic) 
.VBX
Custom control file (Microsoft Visual Basic) 
.VBX
Visual basic extension (Microsoft Visual Basic) 
.VC
Include file with color definitions (Vivid 2.0) 
.VC
Spreadsheet (VisaCalc) 
.VCE
Unformatted voice file (Natural Microsystems) (NMS) 
.VCE
Unformatted voice file (used by Cool Edit) 
.VCF
Configuration file; defines objects for use with Sense8's WorldToolKit (Vevi) 
.VCF
Virtual card file (Many programs use this extension) 
.VCF
Virtual card file (Netscape) 
.VCT
Class library (Microsoft FoxPro) (MFC) 
.VCW
Visual workbench information file (Microsoft Visual C++) 
.VCX
Class library (Microsoft FoxPro)(MFC) 
.VDA
Graphics image (Generic) 
.VDA
Targa bitmap 
.VDR
Drawing file (ComputerEasy Draw) 
.VEL
3D drawing file (CAD( (Ashlar) 
.VEW
View file (Clipper 5) 
.VEW
View file (Lotus Approach) 
.VFL
Clip art file (PrintMaster Gold) 
.VFM
Voting form (Voter) 
.VFN
Voting form for customers (VFN) 
.VGA
Video graphics array (Font type for display on a VGA Monitor) 
.VGA
Video graphics array (Monitor type, also defines if your monitor is compliant with the new (1994) SVGA (Super Video Graphics Array) (SVGA) 
.VGD
Visual display driver ( Generic CADD) 
.VGR
Graphics file (Ventura Publisher) 
.VI
Graphics file (Jovian Logic VI) 
.VI
Virtual Instrument file (National Instruments LABView) 
.VIC
Graphics file (Vicar) 
.VID
Bethesda video files (Terminator, Future Shock) 
.VID
Bitmap graphics (YUV12C M-Motion Frame Buffer) 
.VID
Screen device driver (Microsoft Word) 
.VID
Shell monitor file (Microsoft DOS v.5) 
.VIF
Khoros Visualisation image (SDSC Image Tool) 
.VIFF
Khoros Visualisation image (SDSC Image Tool) 
.VIK
Graphics Image (Viking) 
.VIR
File identified as a virus-infected file by Norton AntiVirus and possibly others 
.VIS
Graphics image file (VIS) 
.VIV
Streaming video file (VivoActive) 
.VIZ
dVS/dVISE file (Division) 
.VLB
Library file (Corel Ventura) 
.VLM
Drafting program file (Vellum, by Ashler) 
.VM
Virtual memory file (Geoworks) 
.VMC
Virtual memory configuration file (Adobe Acrobat Reader) 
.VMD
On-line video file (Sierra) (Torin's Passage) 
.VMF
Audio file (FaxWorks) 
.VMF
Font characteristics file (Ventura Publishing) 
.VML
Vector markup language (used by Microsoft Office 2000) 
.VMS
Text file with vms specific information 
.VO
Include file with object definiton (Vivid 2.0) 
.VOB
Encrypted video and audio files used on current DVD's (Digital Video Disk) 
.VOC
Audio file (Creative Labs Sound Blaster) 
.VOC
Audio file (Quartet) 
.voc
Audio format (Soundblaster's own format). 
.VOF
Object folder (VZ Programmer) 
.VOX
Audio file (Talking Technology) 
.VOX
Dialogic audio file coded using ADPCM <http://WhatIs.techtarget.com/definition/0,,sid9_gci213763,00.html> 
.VOX
Formatted voice file (Natural Microsystems) (NMS) 
.VP
Publication (Ventura Publisher) 
.VPG
Graphics image file (VPGraphics) 
.VQA
Video files (Westwood Studios) 
.VQE
VQ Locator file (Yamaha Sound) 
.VQF
VQ file (Yamaha Sound) (possible emerging standard) 
.VQL
VQ Locator file (Yamaha Sound) 
.VRF
Configuration file (Oracle 7) 
.VRM
Overlay file (Quattro Pro) 
.VRML
A VRML file 
.VRP
Project file (VXRexx) 
.VRS
Video device driver (WordPerfect for Windows) 
.VS
Include file w/surface definition (Vivid 2.0) 
.VSD
Drawing file (flow chart or schematic)(Shapeware Visio) 
.VSL
Download List file (GetRight) 
.VSM
Simulation model (VisSim) 
.VSN
A Windows 9x/NT ViruSafe version file; used to keep information about all the files in a directory; when a file is accessed, information is compared with the VSN information to ensure that they match 
.VSP
Data print file (Schedule Soft) 
.VSP
Image sprite (SPX) 
.VSS
Smartshapes image file (Shapeware Visio) 
.VSS
Stencil file (Shapeware Visio) 
.VST
Bitmap graphic file (TrueVison Vista) 
.VST
Targa bitmap (Generic) 
.VSW
Workspace file (Shapeware Visio) 
.VUE
Animation file (3D Studio) 
.VUE
View file (dBase IV) 
.VUE
View file (Microsoft FoxPro) 
.VW
Text file (Volkswriter) 
.VWP
Audio MetaSound plug-in (VoxWare Audio Compression Toolkit version 2.02.61) 
.VWP
Audio plug-in (Voxware MetaVoice Toolkit) 
.VWR
File viewer (PC Tools) 
.VXD
Virtual device driver (Microsoft Windows 9.x) 
.W
Word chart file (APPLAUSE) 
.W30
Printer font (AST TurboLaser) 
.W30
Printer font (Ventura Publisher) 
.W31
Startup file (Microsoft Windows 3.1) 
.W3L
W3Launch file 
.W44
Temporary file for Sort or Index (dBase) 
.WAB
Outlook file (Microsoft Outlook, Outlook Express) 
.WAD
<http://WhatIs.techtarget.com/definition/0,,sid9_gci213332,00.html> Large file for Doom game containing video, player level, and other information 
.WAL
Texture file (Quake 2) 
.WAS
Script source code file (Procomm Plus Aspect) 
.WAV
<http://WhatIs.techtarget.com/definition/0,,sid9_gci213473,00.html> Waveform sound (Microsoft Windows) 
.wav
Audio format (sound files common to Microsoft Windows). 
.WAX
Compiled script file (Procomm Plus Aspect) 
.WB1
Notebook (QuattroPro for Windows) 
.WB2
Spreadsheet (QuattroPro for Windows) 
.WB3
Text file (QuattroPro for Windows) 
.WBC
Image file (Webshots) 
.WBF
Batch file (Microsoft Windows 9.x) 
.WBK
Backup file (Microsoft Word for Windows) 
.WBL
Upload file (Argo Webload II) 
.WBR
WordBar File (Crick Software) 
.WBT
Batch file (WinBatch) 
.WBT
Wordbar template (Crick Software) 
.WCD
Macro token list file (WordPerfect for Windows) 
.WCM
Data transmission file (Microsoft Works) 
.WCM
Macro (WordPerfect fdor Windows) 
.WCP
Product information description file (WordPerfect for Windows) 
.WD2
Database file (Info Select) by (Micro Logic) 
.WDB
Database file (Microsoft Works) 
.WDF
WebArt data file (database file that can be converted for use in many programs) 
.WDG
Warftpd remote daemon <http://searchWebServices.techtarget.com/sDefinition/0,,sid26_gci211888,00.html> file 
.WEB
Web document (Corel Zara) 
.WEB
Web source code file 
.WFB
Bank file (Maui/Rio/Monterey) (Turtle Beack WaveFront) 
.WFD
Audio waveform (WaveForm Manager Pro) 
.WFD
Drum set (Maui/Rio/Monterey)(Turtle Beach WaveFront) 
.WFL
Flowchart file (Winflow) 
.WFM
Windows form (Virtual dBase) 
.WFN
Symbol (Corel Draw) 
.WFP
Program file (Turtle Beach WaveFront)(Maui/Rio/Monterey) 
.WFT
Data file (NICOLET (Old Format), see NRF) 
.WFX
Data file (WinFax) 
.WG1
Worksheet (Lotus 1-2-3/G) 
.WG2
Worksheet (Lotus 1-2-3 for O/S2) 
.WGP
Data file (Wild Board Games) 
.WI
Wavelet compressed bitmap (Corel) 
.WID
Width table (Ventura Publisher) 
.WIF
Wavelet image file (see WI) 
.WIL
WinImage file 
.WIM
Wireless identity module (Used by wireless application protocols) 
.WIN
Window file (dBase) 
.WIN
Window file (Microsoft FoxPro) 
.WIN
Window preference file (Pro/Engineer) 
.WIS
Script file (Reynolds & Reynolds) (Stores the results of a database query) 
.with
NSREX 
.WIZ
Page wizard (Microsoft Publisher) 
.WIZ
Wizard file (Microsoft Word) 
.WK1
Spreadsheet (Lotus 1-2-3 v. 1 and 2) 
.WK3
Spreadsheet (Lotus 1-2-3 v. 3) 
.WK4
Spreadsheet (Lotus 1-2-3 v. 4) 
.WKB
Document file (WordPerfect for Windows) 
.WKE
Spreadsheet (Lotus 1-2-3 Educational version) 
.WKQ
Spreadsheet (Quattro Pro) 
.WKS
Document (Microsoft Works) 
.WKS
Spreadsheet (Symphony 1.0) 
.WKS
Worksheet spreadsheet (Lotus 1-2-3) 
.WKS
Workspace file (Xlisp) 
.WLD
REND386/AVRIL file 
.WLF
Upload file (Argo Upload I) 
.WLK
Graphics file (Virtus Walkthrough) 
.WLL
Add-In file (Microsoft) 
.WMA
Audio file in Microsoft Windows Media format (Can be changed to ASF) Siren (Sonic Foundry) 
.WMC
Backup files for startup (MathCAD for Windows) 
.WMC
Macro file (WordPerfect for Windows) 
.WMC
Text file (WordMARC) 
.WMF
Metafile (Microsoft Windows) 
.WN
Text file (NeXT WriteNow) 
.WNF
Outline font description file (CorelDRAW) 
.WOA
Swap file (Microsoft Windows 3.x) 
.WOC
Organization chart (Microsoft Windows OrgChart) 
.word
processing documents 
.WOW
Music module (MOD) (Grave Composer) 
.WP
Document file (WordPerfect for Windows) 
.WP4
Document (WordPerfect for Windows 4.0) 
.WP5
Document (WordPerfect for Windows 5.0) 
.WP6
Document (WordPerfect for Windows 6.0) 
.WPA
Word processor document (ACT!) 
.WPD
Demo file (WordPerfect for Windows) (ALL) 
.WPD
Document (WordPerfect for Windows) 
.WPF
Document (Enable) 
.WPF
Fax document (WorldPort) 
.WPF
Form file (WordPerfect for Windows) 
.WPG
Graphics file (Microsoft Word for Windows) 
.WPG
Microsoft Word for Windows vector graphics (DrawPerfect) 
.WPK
Macro (Microsoft Word for Windows) 
.WPM
Macro (Microsoft Word for Windows) 
.WPS
Text document (Microsoft Works) 
.WPT
Template (Microsoft Word for Windows) 
.WPW
PerfectWorks document (Novell) 
.WQ!
Compressed spreadsheet (QuattroPro) 
.WQ1
Spreadsheet (QuattroPro/DOS) 
.WQ2
Spreadsheet (QuattroPro version 5) 
.WR1
Spreadsheet (Symphony 1.1-2) 
.WR1
Symphony file (Lotus) 
.WRD
Template (Charisma) 
.WRG
ReGet document 
.WRI
Write document (Windows Write) 
.WRK
Project file (CakeWalk Music Audio) 
.WRK
Spreadsheet (Symphony 1.0) 
.WRL
Virtual Reality model 
.WRP
3D modeling file (Raindrop Geomagic) (Scandata) 
.WRP
Compressed Amiga archive (WARP) 
.WRS
Resource file (Microsoft Word for Windows) 
.WRZ
Another VRML <http://WhatIs.techtarget.com/definition/0,,sid9_gci214153,00.html> fileject 
.WS
Text file (WordStar) 
.WS1
Document (WordStar for Windows version 1) 
.WS2
Document (WordStar for Windows version 2) 
.WS3
Document (WordStar for Windows version 3) 
.WS4
Document (WordStar for Windows version 4) 
.WS5
Document (WordStar for Windows version 5) 
.WS6
Document (WordStar for Windows version 6) 
.WS7
Document (WordStar for Windows version 7) 
.WSD
Document (WordStar for Windows 2000) 
.WSP
WorkSpace file (Fortran PowerStation) 
.WST
Document (WordStar for Windows) 
.WSZ
Skin (WinAmp) 
.WTA
Used by wireless telephony applications 
.WVL
Wavelet Compressed Bitmap 
.WVW
Interleaf WorldView format (a PDF format) 
.WWB
Button bar for document window (WordPerfect for Windows) 
.WWK
Keyboard layout file (WordPerfect for Windows) 
.WWL
Add-in file (Microsoft Word) 
.WXD
Music resource file (Relic Entertainment)(Home World) 
.WXP
Document file (EXP for Microsoft Windows) 
.X
AVS image (SDSC Image Tool) 
.X
Source code file (Lex) 
.X01
Secondary index file (Paradox) 
.X02
Secondary index file (Paradox) 
.X03
Secondary index file (Paradox) 
.X04
Secondary index file (Paradox) 
.X05
Secondary index file (Paradox) 
.X06
Secondary index file (Paradox) 
.X07
Secondary index file (Paradox) 
.X08
Secondary index file (Paradox) 
.X09
Secondary index file (Paradox) 
.X16
Macromedia Extra (program extension), 16 bit 
.X32
Macromedia Extra (program extension), 32 bit 
.XAR
Corel Xara drawing 
.XBM
A MIME 'X11" bitmap image 
.XDL
XML Schema file 
.XFN
Printer font file (Ventura Publisher) 
.XFN
Printer font file (Xerox) 
.XFT
Printer font file (24 Pin) (ChiWriter) 
.XFX
Fax Document (Various) 
.XHTML
eXtensible hypertext markup language 
.XI
Instrument file (FastTracker II) 
.XI
Instrument sample file (ScreamTracker) 
.XIF
Image file (Pagis) 
.XIF
Image file (Xerox) (same as TIF) 
.XIF
Image file eXtended (ScanSoft) the file is similar to TIFF and is a 
.XIF
Wang imaging file (Included with Windows 95) 
.XLA
Add-in file (Microsoft Excel) 
.XLA
Archive (Xlib) 
.XLB
Datafile (Microsoft Excel) 
.XLB
Toolbar file (Microsoft Excel) 
.XLC
Chart file (Microsoft Excel) 
.XLD
Dialogue file (Microsoft Excel) 
.XLK
Backup file (Microsoft Excel) 
.XLL
Add-in file (Microsoft Excel) 
.XLL
Dynamic link library (Microsoft Excel) 
.XLM
Macro file (Microsoft Excel) 
.XLS
Worksheet file (Microsoft Excel) 
.XLT
Template file (Microsoft Excel) 
.XLT
Translation table (Lotus 1-2-3) 
.XLT
Translation table (Procomm Plus) 
.XLT
Translation table (Symphony) 
.XLV
VBA module (Microsoft Excel) 
.XLW
Workbook (Microsoft Excel) 
.XM
Music module (MOD) (Fast Tracker 2) 
.XMI
Compressed midi music (eXtended) 
.XML
eXtensible markup language 
.xml
XML source file. See XML. From Binh
.XNF
Network file (Standard) 
.XNK
Shortcut file (Microsoft Exchange) 
.XON
Datafile (Axon) 
.XPM
X BitMap format 
.xpm
XPM image file. 
.XQT
Executable file (Waffle) 
.XQT
Macro file (SuperCalc) 
.XR1
Data file (Epic Megagames Xargon) 
.XRF
Cross-reference file (Generic) 
.XTB
External translation table (LocoScript) 
.XTP
Data file (Xtree) 
.XWD
X Window Dump format (SDSC Image Tool) 
.XWF
Works file (Yamaha XG) (MIDI <http://WhatIs.techtarget.com/definition/0,,sid9_gci212572,00.html> sequencing) 
.XWK
Keyboard mapping file (Crosstalk) 
.XWP
Session file (Crosstalk) 
.XWP
Text file (Xerox Writer) 
.XX
Compressed ASCII archive (XXENCODE) 
.XXE
Compressed ASCII archive (XXENCODE) 
.XXX
XXXX 
.XY
Text file (XYWrite) 
.XY3
Document file (XYWrite III) 
.XY4
Document file (XYWrite IV) 
.XYP
Document file (XYWrite III Plus) 
.XYW
Document file (XYWrite for Windows 4.x) 
.Y
Compressed Amiga archive (YABBA) 
.Y
Grammar file (Yaac) 
.y
yacc source file. 
.Y01
Secondary index file (Paradox) 
.Y02
Secondary index file (Paradox) 
.Y03
Secondary index file (Paradox) 
.Y04
Secondary index file (Paradox) 
.Y05
Secondary index file (Paradox) 
.Y06
Secondary index file (Paradox) 
.Y07
Secondary index file (Paradox) 
.Y08
Secondary index file (Paradox) 
.Y09
Secondary index file (Paradox) 
.YAL
Clipart library (Arts & Letters) 
.YBK
Yearbook file (Microsoft Encarta) 
.YUV
Graphics file (YUV) 
.YZ
Compressed file archive (YAC) 
.Z
Compressed ASCII archive (COMPRESS) 
.Z
File compressed with the compress compression program.  Can be deflated using the 'uncompress' utility.
.Z
Unix file Compressed 
.Z3
Game module (Infocom) 
.ZAP
Compressed file (FileWrangler) 
.ZAP
Software installation settings file (Microsoft Windows) 
.ZDG
Compressed text document (Zview) 
.ZER
Data file (Zerberus) 
.ZGM
Graphics file (ZenoGraphics) 
.zip
File compressed with the pkzip (or PKZIP.EXE for DOS) compression program. 
.ZIP
Zip file Compressed archive 
.ZOM
Compressed Amiga archive (ZOOM) 
.ZOO
An early compressed file format 
.ZVD
Voice file (Zyxel Z-Fax) 
.~$~
Temporary file (1ST Reader) 
.~AP
AppExpert project database file (Borland C++ 4.5) 
.~DE
Project backup file (Borland C++ 4.5) 
.~MN
Menu backup (Norton Commander) 
.~PR
Project backup file (Terramodel) 
/bin
A directory containing executable programs, primarily binary files. 
/bin
A directory that contains executable programs, the majority of which are stored in binary files. Most programs are found in directories /bin and /usr/bin; however, users often keep additional programs in private bin directories, such as /home/linux/bin. 
/dev/null
On UNIX, this is a virtual-file that can be written to. Data written to this file gets discarded. It is similar to the file call NUL on Windows machines. Key point: When rooting a machine, intruders will often redirect logging to /dev/null For example, the command ln -s /dev/null .bash_history will cause the system to stop logging bash commands. Culture: In the vernacular, means much the same thing as black hole. Typical usage: if you don't like what I have to say, please direct your comments to /dev/null. 
/etc
The directory on UNIX where the majority of the configuration information is kept. It is roughly analogous to the Windows registry. Of particular interest is /etc/passwd file that stores all the passwords. Key point: If an intruder can read files from this directory, then they can likely use the information to attack the machine. 
/etc/hosts
The file that contains a list of hostname to IP address mappings. In the old days of the Internet, this is how machines contacted each other. A master hosts file was maintained and downloaded to machines on a regular basis. Then DNS came along. Like the vestigial appendix. On Windows, this file is stored in %SystemRoot%\system32\drivers\etc. Hack: If you can write files to a user's machine, then you can add entries to his/her hosts files to point to your own machine instead. For example, put an entry for www.microsoft.com to point to your machine, then proxy all the connections for the user. This will allow you to perform a man in the middle attack. 
/etc/hosts.equiv
On UNIX, the "hosts.equiv" file lists other hosts that can be thought of as "equivalent" to this one. This machine will therefore "trust" these other machines. Users connecting to this machine from the listed machines will not have to present a password, it is assumed that these other machines have already verified the password. Analogy: The European Union (EU) doesn't have passport control between countries. You only have to present your passport when entering the first European country, then you can roam freely once inside the union. The "hosts.equiv" file creates a similar union of machines. Hack: Hackers will target this file. If their target is machine A, they may instead find that A trusts B, and B may be easier to break into first. At that point, the hacker can hop back to A using an account on B. Likewise, if a hacker can write to this file, they can tell the system to trust any other system on the network (including the hackers own machine). Hack: Older software would do a reverse DNS lookup on a connecting IP address. If the hacker controlled the DNS server, s/he could return a trusted domain name, and therefore be allowed into the system. Another older hack is the default "+" entry. 
/etc/passwd
The UNIX file that contains the account information, such as username, password, login directory, and default shell. All normal users on the system can read this file. Key point: The passwords are encrypted, so even though everyone can read the file, it doesn't automatically guarantee access to the system. However, programs like crack are very effective at decrypting the passwords. On any system with many accounts, there is a good chance the hacker will be able to crack some of the accounts if they get hold of this file. Key point: Modern UNIX systems allow for shadowed password files, stored in locations like /etc/shadow that only root has access to. The normal password file still exists, minus the password information. This provides backwards compatibility for programs that still must access the password file for account information, but which have no interest in the passwords themselves. Key point: The chief goal of most hacks against UNIX systems is to retrieve the password file. Many attacks do not compromise the machine directly, but are able to read files from the machine, such as this file. 
/etc/services
On UNIX, the configuration file /etc/services maps port numbers to named services. Key point: Its role in life is so that programs can do a getportbyname() sockets call in their code in order to get what port they should use. For example, a POP3 email daemon would do a getportbyname("pop3") in order to retrieve the number 110 that pop3 runs at. The idea is that if all POP3 daemons use getportbyname(), then no matter what POP3 daemon you run, you can always reconfigure its port number by editing /etc/services. Misunderstanding: This file is bad in order to figure out what port numbers mean. If you want to find out what ports programs are using, you should instead use the program lsof to find out exactly which ports are bound to which processes. If running lsof is not appropriate, then you should lookup the ports in a more generic reference. 
0-day (zero-day)
The term 0-day exploit describes an exploit that is not publicly known. It describe tools by elite hackers who have discovered a new bug and shared it only with close friends. It also describes some new exploit for compromising popular services (the usual suspects: BIND, FTP services, Linux distros, Microsoft IIS, Solaris servers). Many 0-day exploits are discovered by the victims when hackers use them, or by honeypots. The term "0-day" describes the fact that the value of exploits quickly goes down as soon as they are announced. The next day they are half as valuable. The 2nd day they are a 1/4 as valuable. Ten days later they are 1/1000 as valuable as on day 0. This is because script-kiddies quickly use the exploits on computers throughout the Internet, compromising systems before anybody else can get to them. Contrast: The term 0-day exploit describe the hard-to-use exploits by the discoverer himself (or close friends), in contrast to the easy-to-use scripts employed by script kiddies. For example, a buffer-overflow script will go through many phases as people try to find the right offsets for the target platforms, but will eventually end up as a broad-spectrum aim-and-shoot script that anybody could use. Key point: One of the dangers of 0-day exploits is BUGTRAQ camping. A hacker discovers all the services running on the target victim and waits for day-0 when the exploit is announced. At that time, the hacker attacks the systems with the new exploit. Key point: The term "0-day" describes any bit of information in the community, whether it is serial numbers, lists of proxies, or passwords to porn sites. As soon as such information becomes well-known and exploited by large numbers of people, it is then fixed by the victim. Information has a "half-life": the older it is, the less value it has. 
100VG
100 Voice Grade [technology] 
2-Disk Xwindow embedded Linux
Mungkie Associates Inc. provides 2-Disk Xwindow embedded Linux. The distribution is intended to be a demonstration of Mungkie Associates' embedded appliance development environment, showing the sort of environment that can be created for small appliance GUI systems. It is further intended to give a minimal Linux base system on 1 disk and a fully expandable X system implementation on a second disk. The two disks can be used together for a minimal system or the X disk can be used seperately on any libc2.1 linux system. The source tree is compiled on Debian and the /lib/ files taken directly from the Debian-2.2.3 distribution. The 2-disk system is free for personal use, but restrictions apply to commercial usage. Version 1.4rc802 was released November 6, 2002. Version 1disk1.0 final was released January 18, 2003. A 1disk 1.0 update was released February 5, 2003. Version 1.0.8 (Source code) was released May 30, 2003. 
2S2D
Double Sided - Double Density (FDD) 
3dchess
3D chess for X11 3 dimensional Chess for X11R6. Three boards, 96 pieces and 26 directions.  3Dwm is a 3D window manager for Linux From Binh
3DDDI
3D Device Dependent Interface (MS), "3D DDI" 
3DRAM
3 Dimensional Random Access Memory (RAM) 
3dwm
The 3dwm project is working with the creation of a three-dimensional worspace manager that can run in the 3D Cube as well as on desktop computers. Note that wm does not stand for the term window manager. It is a bit misleading; 3dwm is not a window manager in the true sense of the word, but rather more of a gerneral user environment. The window manager functionality of the system is merely the tip of the iceberg; 3Dwm contains general primitives for building applications with three-dimensional interfaces. From 3dwm
3dwm-clock
A 3Dwm apps The 3Dwm clock application (tdwm-clock) is the first real application that is even remotely useful. It makes use of the 3Dwm Nobel API, including the new solid modeling support, to create a three-dimensional analog clock displaying the current time. 
3dwm-csgclient
A 3Dwm client A simple client which is builded using new libsolid. This is only an example on how libsolid work. 
3dwm-geoclient
A 3Dwm client This is a very simple 3Dwm client that connects to the exported GeometryKit in the server, creates a Geometry, loads a 3D file from the local system (in this case a simple model of an office, which also happens to be Rob's room), and passes it to the 3Dwm server. The 3Dwm server will happily render any geometry that is created, so running geoclient several times will add more geometries to the graphical output. Please note that you may need to zoom out (using the 'X' key) to see graphical output. The geoclient is able to open native .raw files as well as standard 3ds files (using MeshIO). In other words, you may experiment by loading other files than the supplied office model to the 3Dwm server. 
3dwm-pickclient
A 3Dwm client This is an example showing how libzorn work. 
3dwm-server
Binary server daemon This package contains display binary server daemon. 
3dwm-texclient
A 3Dwm client This is a simple client used for testing the 3Dwm texture capabilities. 
3dwm-vncclient
A 3Dwm client This will open a connection to the VNC server from the 3Dwm server, and the graphical output will be displayed on a single quad in the 3Dwm world (you may need to zoom out to see it). Currently, vncclient supports no interaction with the VNC window (the bindings and the actual communication code has been implemented, only the 3Dwm side is missing). 
3GIP
3rd Generation . Internet Protocol (org., IP, GPRS, WLAN, mobile-systems), "3G.IP" 
3GL
3rd Generation Language 
3GPP
Third Generation Partnerships Projects (org.) 
4.2
/for' poynt too'/ n. Without a prefix, this almost invariably refers to BSD Unix release 4.2. Note that it is an indication of cluelessness to say "version 4.2", and "release 4.2" is rare; the number stands on its own, or is used in the more explicit forms 4.2BSD or (less commonly) BSD 4.2. Similar remarks apply to "4.3", "4.4" and to earlier, less-widespread releases 4.1 and 2.9. 
44bsd-rdist
4.4BSD rdist. This is the traditional rdist from 4.4BSD Lite with FreeBSD fixes. It is provided for compatibility with third-party rdist implementations. This is the binary package for 4.4BSD rdist. 
4GL
4th Generation Language 
4GT
4 GB [RAM] Tuning (RAM, GB) 
4Suite
The 4Suite package contains XML-related tools and libraries for Python, including 4DOM, 4XSLT, 4XPath, 4RDF, and 4XPointer. 4DOM is animplementation of the World Wide Web Consortium's (W3C) standard DOMAPI for HTML and XML content manipulation. 4DOM provides full distributed-object support based on the IDL used in the formal DOM specification. 4XSLT is an XSLT processor, which can be used to renderXML documents as customized and stylized HTML for current Web browsers. 4XSLT also provides a powerful programming API forapplications to use for low-level, customized transformations of XML documents. 4XPath is a library implementating the W3C's XPath language for indicating and selecting portions of an XML document. 4RDF is a toolkit and library for RDF processing. 4XPointer is a toolkit for processing fragment identifiers for URI references which locateresources of Internet media type text/xml. 
5GL
5th Generation Language 
6tunnel
TCP proxy for non-IPv6 applications 6tunnel allows you to use services provided by IPv6 hosts with IPv4-only applications and vice versa. It can bind to any of your IPv4 or IPv6 addresses and forward all data to IPv4 or IPv6 host. It can be used for example as an IPv6-capable IRC proxy. 
8-character password
Some systems, like Win9x and Solaris, limit the user to 8 characters in the password. Key point: Security conscious users of such systems need to make sure they use a more random mix of characters because they cannot create long passwords. Key point: Password cracking such systems is a little easier. 
8.3 filename
A filename corresponding to the standard MS-DOS gleaming conventions, which restrict filenames to 8 characters and optional extensions to 3 characters. From QUECID Such restictions can prove to be an infuriating problem like when transfering files across a heterogenous network such as between Windows and Linux machines. Since older versions of Windows only support 8.3 style filenames files transferred to it will be truncated. For example, "C:\Program Files" may appear to be "C:\Progra~1" From Binh
802.11
Standard protocol for radio-frequency wireless data transmission and networking. Also called Wi-Fi. 
80211HR
802.11 High Rate (IEEE, WLAN), "802.11/HR" 
822-date
Command to print date and time in RFC822 format 
8PSK
8 Phase Shift Keying (EDGE, mobile-systems) 
8VSB
8-Vestigial Side Band, "8-VSB" 
9menu
Creates X menus from the shell. This is 9menu, a simple program that allows you to create X menus from the shell, where each menu item will run a command. 9menu is intended for use with 9wm, but can be used with any other window manager. 
9wm
An emulation of the Plan 9 window manager 8-1/2. 9wm is an X window manager which attempts to emulate the Plan 9 window manager 8-1/2 as far as possible within the constraints imposed by X. It provides a simple yet comfortable user interface, without garish decorations or title-bars. Or icons. And it's click-to-type. 
[
check file types and compare values 
~user
On UNIX, a home directory can be referenced by using a tilde (~) followed by their login name. For example, "ls ~rob" on my computer will list all the files in "/home/rob". Key point: Web-servers often allow access to user's directories this way. An example would be http://www.robertgraham.com/~rob. Key point: A big hole on the Internet is that people unexpectedly open up information. For example, the file .bash_history is a hidden file in a person's directory that contains the complete text of all commands they've entered into the shell (assuming their shell is bash, which is the most popular one on Linux). 
A
a-Linux
a-Linux is an x86 floppy-based mini-distribution, where assembly code meets Linux kernel. It contains only programs written in assembly language. It is extemely small, yet functional, and provides HTTP and FTP services out-of-the-box. Initial version 0.17 was released August 17, 2002. A floppy-based distribution. 
a2p
Awk to Perl translator 
a2ps
GNU a2ps 'Anything to PostScript' converter and pretty-printer a2ps converts files into PostScript for printing or viewing. It uses a nice default format, usually two pages on each physical page, borders surrounding pages, headers with useful information (page number, printing date, file name or supplied header), line numbering, symbol substitution as well as pretty printing for a wide range of programming languages. Historically, a2ps started as a text to PostScript converter, but thanks to powerful delegations it is able to let you use it for any kind of files, ie it can also digest manual pages, dvi files, texinfo, .... Among the other most noticeable features of a2ps are: - various encodings (all the Latins and others), - various fonts (automatic font down loading), - various medias, - various printer interfaces, - various output styles, - various programming languages, - various helping applications, - and various spoken languages. 
a2ps
The a2ps filter converts text and other types of files to PostScript format. A2ps has pretty-printing capabilities and includes support for a wide number of programming languages, encodings (ISO Latins, Cyrillic, etc.), and media. 
a52dec
Utilities to extract and decode ATCS A/52 streams Utilities to extract and decode ATCS A/52 streams. The A/52 standard is used in a variety of applications, including digital television and DVD. It is also known as AC-3. 
AA
Auto Answer (MODEM) 
aa3d
An ASCII art stereogram generator This program generates the well known and popular random dot stereograms in ASCII art. 
AAA
Authentication, Authorization and Accounting 
AAC
Advanced Audio Coding (IIS, MPEG) 
AAC
Authorization and Access Control (IETF) 
AAD
Authorized AutoCAD Dealer (AutoCAD, CAD) 
AADN
American Association of DOMAIN Names (org., USA, Internet) 
AAF
Advanced Authoring Format (MS) 
AAIS
Allied command europe ACCIS Implementation Strategy (ACCIS, NATO, mil.) 
AAL
ATM Adaption Layer (ATM) 
aalib-bin
sample programs using aalib AAlib is a portable ascii art graphics library. Internally, it works like a graphics display, but the output is rendered into gorgeous platform independent ascii graphics. This package contains a few sample programs that use aalib. 
AAM
Automatic Accoustic Management (ATA, HDD) 
AAMSI
American Association for Medical Systems Informatics (org., USA) 
AAP
Address Allocation Protocol (Multicast) 
AAP
Applications Access Point 
AAP
Association of American Publishers (org., USA) 
AARP
Appletalk Address Resolution Protocol (Apple, AppleTalk) 
AASP
ASCII Asynchronous Support Package (ASCII) 
AAT
Average Access Time 
AATP
Authorized Academic Training Program (MS, MCSD) 
aatv
A program to watch TV in a text-based console aatv is a program which allows you to watch TV in a text-based console, i.e. in a virtual console or in an xterm. 
AAUI
Apple Attachment Unit Interface (Apple, AppleTalk) 
ABA
American Bankers Association (org., USA, banking) 
ABAP4
Advanced Business Application Programming/4 (SAP, R/3, 4GL), "ABAP/4" 
ABATS
Automatic Bit Access Test System 
ABBS
Apple Bulletin Board System (Apple) 
ABC
Atanasoff-Berry-Computer 
abc2ps
Translates ABC music description files to PostScript This is the Debian port of the abc2ps program by Michael Methfessel. The program translates tunes written in the ABC format to PostScript, which can then be viewed using Ghostview et al. or printed on a PostScript printer or through Ghostscript. It supports various semi-standard extensions to the ABC standard, such as multiple voices and staves. 
ABCD
Altavista Business Card Directory (WWW) 
abcde
A Better CD Encoder A frontend program to cdparanoia, wget, cd-discid, id3, and your favorite Ogg or MP3 encoder (defaults to oggenc). Grabs an entire CD and converts each track to Ogg or MP3, then comments or ID3-tags each file, with one command. 
abcmidi
A converter from ABC to MIDI format and back This package contains the programs `abc2midi' and `midi2abc', which convert from the abc musical notation format to standard MIDI format and vice-versa. They can generate accompaniment from guitar chords in the abc file, as well as insert various MIDI events; the MIDI-to-abc translation tries to figure out bars, triplets and accidentals on its own. The package also contains `abc2abc' (an abc prettyprinter/transposer) and `mftext' (a program that will dump a MIDI file as text). The programs in this package are based on the `midifilelib' distribution available from http://www.harmony-central.com/MIDI/. 
abcmidi-yaps
Yet another ABC to PostScript converter This program translates tunes written in the ABC format to PostScript, which can then be viewed on screen or printed. It is essentially a (non-exclusive) alternative to abc2ps, being based on the abc2ps PostScript code together with the ABC parser from the abcmidi package. 
ABEL
Advanced Boolean Expression Language 
ABEND
ABnormal END (Netware) 
ABI
Application Binary Interface (POE) 
ABI
Application Binary Interface: details the machine language of the CPU family as well as the calls between the application and the operating system. 
abicheck
binary compatibility checking tool ABIcheck is a tool for checking an application's compliance with a library's defined Application Binary Interface (ABI). It relies on ABI definition information contained in the library. Example definitions are given for GNOME and glibc. 
ABIOS
Advanced Basic Input Output System (IBM) 
ABIST
Automatic Built In Self Test (IBM) 
abiword
WYSIWYG word processor AbiWord is the first application of a complete, open source office suite. The upstream source includes cross-platform support for Win32, BeOS, and QNX as well as GTK+ on Unix. AbiWord is still being developed. It's quite usable but not yet full- featured or polished. For many applications, however, it should prove effective and efficient. This program includes support for reading Microsoft Word files, RTF files, and many other foreign file formats. Natively, it uses a custom XML-based file format. 
ABM
Asynchronous Balanced Mode 
ABNF
Augmented Backus-Naur Form (BNF) 
abook
A text-based ncurses address book application. abook is a text-based ncurses address book application. It provides many different fields of user info. abook is designed for use with mutt, but can be used independently. 
ABP
Address Book Provider (Internet) 
ABR
Available Bit Rate (ATM, CBR, VBR, UBR, QOS) 
ABS
Apple Business Systems (Apple) 
absolute
Relating to file systems, the location of a directory or file that can be accessed regardless of the current working location of a user or program. For example, to access the Samba configuration file regardless of your current working directory, use the following absolute path: /etc/samba/smb.conf. 
absolute pathname
A pathname that explicitly identifies all directories from the root directory to an individual file. For example, pathname /home/linus/kernel/test refers to a file named test in directory kernel, which belongs to directory linus, which belongs to directory home, which belongs to the root directory /. 
ABUI
Association of Banyan Users International (org., Banyan, VINES, user group, predecessor, ENA) 
AbulEdu
AbulEdu is a Mandrake-based distribution for primary schools. It is currently in French but most of the tools can be translated. An AbulEdu server can handle Mac (netatalk), Windows (samba), GNU/Linux and X terminal (with LTSP) clients. The server acts as a central gateway for Web, mail, and printing, and facilitates the management of classes, pupils, and teachers. Everybody can publish Web pages on an intranet using Apache and all administration tasks are performed using a browser. The result is that a teacher who is not a computer specialist can install and manage a school network. Stable version 1.0.7-II was released May 26, 2003. Development version 1.0.11 beta 4 was released October 7, 2002. 
abuse
Crack dot Com's Abuse action game. Abuse is a side scrolling shoot-em-up action game from Crack dot Com. This package contains the Abuse game engine, in X and full screen svga versions. It requires a mouse. This package is obsolete and will be removed later (if you still need it, contact the maintainer). Please use abuse-sdl instead. 
AC
Access Concentrator (PPPoE, ADSL) 
AC
Access Control (Token Ring, ...) 
AC
Amiga Club (org., user group, Amiga) 
AC
Area Code 
AC
Automatic Computer 
AC3
[digital] Audio Compression - 3 (Dolby, DVD, Digital audio), "AC-3" 
AC97
Audio CODEC 97 (Intel, CODEC) 
ACA
Asynchronous Communications Adapter 
ACAD
AutoCAD (AutoCAD, CAD) 
ACAS
Application Control Architecture Services (DEC) 
ACC
Area Communication Controller (MODACOM) 
ACC
Atari Competence Center 
access
check user's permissions for a file 
access
determine whether a file can be accessed 
access control (access)
Access control refers to controlling access by a user to a computer system, or data on that system. In formal terms, a "subject" (e.g. a user) attempts to access the "object" (e.g. system or data). An access control system will evaluate the security levels of the subject and object in order to see if access is permitted. Example: A simple example is the case where you enter a username and password in order to log onto the computer. Contrast: mandatory access control The system gives users "clearance levels", and assigns sensitivity levels to information. Therefore, if you only have "secret" clearance level, you cannot access "top-secret" information, but you can access "secret" or "confidential" information. See: Bell-LaPadula Model for more information. discretionary access control This system assigns subjects (users) to one or more groups. An object (system or file) contains a DACL (discretionary access control list) enumeration which users and groups may access the object. See: Access Control List for more information. Key point: There are different kinds of access. Read access means that somebody can read information, whereas write access implies that that somebody can change the data. For example, you can get a copy of your credit report and read it, but you can't necessarily change the data. 
Access Control List (access, ACL)
Controlling access not only the system in general, but also resources within the system. For example, firewalls can be configured to allow access to different portions of the network for different users. Likewise, even after you log onto a file server, the server may still block access to certain files. Key point: An Access Control List (ACL) is used to list those accounts that have access to the resource that the list applies to. When talking about firewalls, the ACL implies the list of IP addresses that have access to which ports and systems through the firewall. When talking about WinNT, the ACL implies the list of users that can access a specific file or directory on NTFS. Contrast: Discretionary Access Control is the ability to have fine grained control over who has access to what resources. Misconception: Many people believe that firewall IP address rules or IEEE 802.11 MAC address rules form robust ACLs. However, since neither IP addresses or MAC addresses provide robust authentication, such ACLs provide only a weak form of security. When these so-called ACLs are relied upon for security, they frequently lead to compromises as people spoof their IP or forge their MAC address. 
access permissions
a set of permissions associated with every file and directory that determine who can read it, write to it, or execute it. Only the owner of the file (or the super-user) can change these permissions. 
accessdb
dumps the content of a man-db database in a human readable format. 
ACCIS
Automated Command and Control Information System (mil., USA) 
ACCM
Asynchronous Character Control Map (PPP) 
account
a cominbation of login and password which is normally created by the system administrator. The creation of an account includes the assignment of a home directory. 
Account Name
Same as Login ID, User ID, or User Name. The name assigned to a user on a UNIX/Linux system. Multiple users can be set up on a system with unique account names, each with varying access (permission) levels. After Linux installation, account names are assigned by the Superuser, or root operator. 
ACCS
Army Command and Control System (mil., USA) 
acct
The GNU Accounting utilities. The GNU Accounting utilities `ac', `accton', `last', `lastcomm', and `sa' add login and process accounting support to Debian Linux. "Login accounting" provides summaries of system resource usage based on connect time, and "process accounting" provides summaries based on the commands executed on the system. The 'last' command is provided by the Debian sysvinit package and not included here. 
ACCU
Association of C and C++ Users (org., UK) 
ACD
Automated Call Distribution (CTI) 
ACDC
Alternating Current/Direct Current, "AC/DC" 
ACDI
Asynchronous Communications Device Interface (IBM, CM/2) 
ACE
Access Control Entry (AD) 
ACE
Advanced Computing Environment (manufacturer) 
ACE
ASCII Compatible Encoding (ASCII, Internet, DOMAIN) 
ACE
Autonomous Computer Engine (WD) 
ace-of-penguins
Solitaire-games with penguin-look. From the author's intro.html: "The Ace of Penguins is a set of Unix/X solitaire games based on the ones available for Windows(tm) but with a number of enhancements that make my wife like my versions better :-)" The package consists of the games Pegged, Minesweeper, Solitaire, Taipei (together with a level editor), Golf, Mastermind, Merlin and Freecell. 
ACF
Access Control Field 
ACF
Advanced Communications Function (IBM) 
ACF
Apple Communications Framework (Apple) 
acfax
Receive faxes using your radio and sound card acfax allows you to receive faxes using your sound card. Typically you might use it to decode faxes sent over HF radio or from satellites. 
ACFC
Address and Control Field Compression (PPP) 
ACFNCP
Advanced Communication Function / Network Control Program (IBM, ACF), "ACF/NCP" 
ACFTCAM
Advanced Communication Function / Telecommunications Access Method (IBM, ACF), "ACF/TCAM" 
ACFVTAM
Advanced Communication Function / Virtual Telecommunications Access Method (IBM, ACF), "ACF/VTAM" 
ACH
Association for Computers and the Humanities (org., USA) 
achilles
An artificial life and evolution simulator Achilles is an artificial life and evolution simulator that uses Hebbian neural networks and OpenGL/SDL to simulate life in a simplified environment. It is based on Larry Yaeger's PolyWorld. 
ACIA
Associacio Catalana d'Intelligencia Artificial (org., Spain, AI) 
ACIA
Asynchronous Communications Interface Adapter 
ACID
Analysis Console for Intrusion Databases (IDS, CERT) 
ACID
Atomicity - Consistency - Isolation - Durability (DB, TP) 
acidlab
Analysis Console for Intrusion Databases The Analysis Console for Intrusion Databases (ACID) is a PHP-based analysis engine to search and process a database of security events generated by various IDSes, firewalls, and network monitoring tools. The features currently include: o Query-builder and search interface for finding alerts matching on alert meta information (e.g. signature, detection time) as well as the underlying network evidence (e.g. source/destination address, ports, payload, or flags). o Packet viewer (decoder) will graphically display the layer-3 and layer-4 packet information of logged alerts o Alert management by providing constructs to logically group alerts to create incidents (alert groups), deleting the handled alerts or false positives, exporting to email for collaboration, or archiving of alerts to transfer them between alert databases. o Chart and statistic generation based on time, sensor, signature, protocol, IP address, TCP/UDP ports, or classification ACID has the ability to analyze a wide variety of events which are post-processed into its database. Tools exist for the following formats: o using Snort (www.snort.org) - Snort alerts - tcpdump binary logs o using logsnorter (www.snort.org/downloads/logsnorter-0.2.tar.gz) - Cisco PIX - ipchains - iptables - ipfw 
acidwarp
This is a linux port of the popular dos program Acidwarp. Acidwarp is a program that makes neat looking pictures and rotates the palette. Its only use is for entertainment, but it is neat. I stumbled upon source code for Acidwarp on the net one day, and decided that it was high time someone ported it to linux. So, here it is. 
ACIS
American Commitee for Interoperable Systems (org., USA) 
ACK
/ak/ interj. 1. [common; from the ASCII mnemonic for 0000110] Acknowledge. Used to register one's presence (compare mainstream Yo!). An appropriate response to ping or ENQ. 2. [from the comic strip "Bloom County"] An exclamation of surprised disgust, esp. in "Ack pffft!" Semi-humorous. Generally this sense is not spelled in caps (ACK) and is distinguished by a following exclamation point. 3. Used to politely interrupt someone to tell them you understand their point (see NAK). Thus, for example, you might cut off an overly long explanation with "Ack. Ack. Ack. I get it now". 4. An affirmative. "Think we ought to ditch that damn NT server for a Linux box?" "ACK!" There is also a usage "ACK?" (from sense 1) meaning "Are you there?", often used in email when earlier mail has produced no reply, or during a lull in talk mode to see if the person has gone away (the standard humorous response is of course NAK (sense 1), i.e., "I'm not here"). 
ack
Kanji code converter ACK is a highly versatile Kanji code converter. ACK can do reciprocal conversion among Japanese EUC, Shift-JIS and 7bit JIS. JIS Kata-kana(SJIS Han-kaku Kana) is also supported. Kanji code can be automatically detected even if the input stream contains Kata-kana characters. Besides, ACK can be used as a Kanji code checker with very high detection rate. 
ACL
Access Control List (DCE, DFS, NDS, AD) 
acl
Access control list utilities This package contains the getfacl and setfacl utilities needed for manipulating access control lists. 
ACL
Advanced CMOS Logic 
ACL
Agent Control Language (Agents) 
ACL
Association for Computational Linguistics (org., USA) 
ACL
[MS] Access Compatibility Layer (MS, DB) 
ACLF
Access Control List Facility (DCE) 
aclocal
automatically generate aclocal.m4 from configure.in 
ACM
Address Complete Message (ATM) 
ACM
Association for Computing Machinery (org., USA) 
acm4
A multi-player aerial combat simulation. acm is an air combat simulator that runs under the X window system. Up to eight players can engage in simultaneous air combat. 
ACME
A Company that Makes Everything (slang) 
ACMS
Application Control Management System 
ACO
AMP Communications Outlet 
ACOPS
Automatic CPU Overheating Prevention System (GigaByte), "A-COPS" 
acorn-fdisk
Partition editor for Acorn/RISC OS machines Acorn-fdisk allows you to edit disk partitions on Acorn machines. It understands a variety of the partition tables formats used under RISC OS, including Filecore, ICS-IDE, EESOX and Powertec. 
ACOT
Apple Classrooms Of Tomorrow (Apple) 
ACP
Active Configuration Profile (MODEM) 
ACP
Auxillary Control Process 
ACPA
Audio Capture and Playback Adapter (IBM) 
ACPC
Apple Communications Protocol Card (Apple) 
ACPI
(Advanced configuration and Power Interface) is an open industry specification co-developed by Hewlett-Packard, Intel, Microsoft, and Toshiba. ACPI establishes industry-standard interfaces for OS-directed configuration and power management on laptops, desktops, and servers. ACPI evolves the existing collection of power management BIOS code, Advanced Power Management (APM) application programming interfaces (APIs, PNPBIOS APIs, Multiprocessor Specification (MPS) tables and so on into a well-defined power management and configuration interface specification. The specification enables new power management technology to evolve independantly in operating systems and hardware while ensuring that they continue to work together. From ACPI
ACPI
Advanced Configuration and Power Interface (Intel, MS, Toshiba, ACPI, OSPM) 
ACPICA
Advanced Configuration and Power Interface - Component Architecture (ACPI, Intel), "ACPI-CA" 
acpid
Utilities for using ACPI Modern computers support the Advanced Configuration and Power Interface (ACPI) to allow intelligent power management on your system and to query battery and configuration status. This package contains acpid, which is the user-space daemon needed in order to make the Linux ACPI support completely functional. In order to use this package you need a recent Kernel (=>2.4.7). This can be one including the patches on http://acpid.sourceforge.net or a non patched one. 
ACPT
Automated Corporate Planning Tool 
ACR
Anonymous Call Rejection 
ACR
Attenuation to Crosstalk Ratio (cable) 
ACR
Automatic Call Recording 
ACRONYM
Abreviation by CROping Names that Yield Meaning (slang) 
acronym
an abbreviation. Examples of Linux related acronyms are KDE, ELF and GNU. 
ACS
Access Control System (DISA) 
ACS
Advanced Communications System 
acs
Al's Circuit Simulator -- dummy package acs, Al's Circuit Simulator, has been renamed GNUCAP. This is a dummy package to force an upgrade to the new package name. 
ACS
Alternate character set 
ACS
Architekten, Computer, Systeme (fair) 
ACS
Asynchronous Communication Server 
ACS
Australian Computer Science 
ACS
Australian Computer Society (org., Australia) 
ACSE
Association Control Service Element (OSI, ISO, DIS 8649) 
ACSI
Advanced/Atari Computer System Interface (Atari) 
ACSMIB
ATM Circuit Steering Management Information Base (ATM, MIB), "ACS-MIB" 
ACSNET
Academic Computing Services NETwork 
ACSS
Aural Cascading Style Sheets (CSS, HTML, WWW) 
ACT
Architecture Characterization Template (DISA) 
ACTA
America's Carriers Telecommunications Association (USA) 
ACTEF
ACcess TEchnologies Forum (org.) 
activate
read/write flags marking active boot partition 
ACTPU
ACTivate Physical Unit (SNA) 
ACTS
Advanced Communications Technologies and Services (Europe, ACTS) 
ACU
Automatic Calling Unit 
ACU
Automatic Client Update (Novell, Netware) 
ACUTA
Association of College and University Telecommunication Administrators (org., USA) 
AD
Active Directory (MS, WIndows, AD, DS) 
AD
Analog-to-Digital (D/A), "A/D" 
AD
Authorized Distributor (DEC) 
AD
Autonomous DOMAIN 
ad-hoc
A wireless networking architecture in which there is no central access point. Nodes act as peers on the network and transmit information directly to recipient nodes. 
ADA
Automatic Data Acquisitions 
Ada
n. A Pascal-descended language that was at one time made mandatory for Department of Defense software projects by the Pentagon. Hackers are nearly unanimous in observing that, technically, it is precisely what one might expect given that kind of endorsement by fiat; designed by committee, crockish, difficult to use, and overall a disastrous, multi-billion-dollar boondoggle (one common description wss "The PL/I of the 1980s"). Hackers find Ada's exception-handling and inter-process communication features particularly hilarious. Ada Lovelace (the daughter of Lord Byron who became the world's first programmer while cooperating with Charles Babbage on the design of his mechanical computing engines in the mid-1800s) would almost certainly blanch at the use to which her name has latterly been put; the kindest thing that has been said about it is that there is probably a good small language screaming to get out from inside its vast, elephantine bulk. 
adacgi
Ada CGI interface This package lets you build CGI applications in Ada. 
Adamantix
Adamantix, formerly known as TrustedDebian, aims to create a highly secure but usable Linux platform. To accomplish this, the project will use currently available security solutions for Linux (like kernel patches, compiler patches, security related programs and techniques) and knit these together to a highly secure Linux platform. The initial release, version 0.9, became available March 18, 2003. Version 1.0.1 was released June 12, 2003. A 'secured' distribution. 
ADAPSO
Association of Data Processing Service Organisation (org., USA) 
ADAPT
Architecture Design, Analysis, and Planning Tool 
adapter
a device that allows one system to connect to and work with another. 
adaptive compression
a data compression technique that dynamically adjusts the algorithm used based on the content of the data being compressed. 
ADATP
Allied DATa processing Publication (mil., USA) 
ADB
A DeBugger (Unix) 
ADB
Apple Desktop Bus (Apple) 
adbbs
ad! BBS. A perl based bbs or easy menu system. aD! BBS was basically written to provide a nice, easy to use menu / bbs interface, currently it doesn't handle special permissions, group permissions, etc. but they are in the 'todo' list. Supports ANSI Color. 
ADBS
Advanced Data Broadcasting System (DirecPC) 
ADC
Adaptive Data Compression (MODEM) 
ADC
Analog to Digital Converter 
ADC
Apple Display Connector (Apple) 
ADC
Apple Distribution Center (Apple) 
ADC
Automatic Data Capture 
ADCCP
Advanced Data Communications Control Procedure (ANSI) 
ADD
Adapter Device Driver (OS/2) 
ADDC
Automatic Data Direction Control (RS-485) 
ADDDC
Automatic Direct Distance Dialing System 
addgroup
add a user or group to the system 
addr2line
convert addresses into file names and line numbers. 
addressbook
Tk personal address manager Addressbook is an address manager meant to replace your old paper rolodex. It stores addresses, phone and fax numbers and can interact with some additional programs (i.e., for dialing) It has a nice user interface written in Tcl/Tk. The additional suggested software will enable additional functionality, such as automatic dialing, faxing, printing, etc. The program is still fully functional without any of the suggested software. Author: Clemens Durka <clemens@dagobah.de> Homepage: http://home.pages.de/~addressbook/ 
adduser
Add and remove users and groups This package includes the adduser and deluser commands for creating and removing users. o Adduser can create new users and groups and add existing users to existing groups. o Deluser can remove users and groups and remove users from a given group. Adding users with adduser is much easier than adding them by hand. Adduser will choose appropriate UID and GID values, create a home directory, copy skeletal user configuration, allow you to set an initial password and the GECOS field. Deluser can optionally remove and backup the user's home directory and mail spool or all files on the system owned by him. Optionally a custom script can be executed after each of the commands. 
ADE
Application Development Environment 
ADE
Aufforderung zur DatenEingabe (BTX) 
ADEPT
Administrative Data Entry for Processing Transmission (mil., USA) 
ADES
Automatic Digital Encoding System 
ADEW
Andrew Development Environment Workbench (ATK, Unix) 
ADF
Access control Decision Function (mil., USA) 
ADF
Automatic Document Feeder 
ADI
Autocad Device Interface (CAD, AutoCAD) 
ADI
AUTODIN-to-DISN Interface (AUTODIN, DISN, mil., USA) 
ADIMM
Asynchronous Dual Inline Memory Module (DIMM, IC, Leadtek) 
adjtimex
Utility to display or set the kernel time variables This program gives you raw access to the kernel time variables. For a machine connected to the Internet, or equipped with a precision oscillator or radio clock, the best way to keep the system clock correct is with xntpd. However, for a standalone or intermittently connected machine, you may use adjtimex instead to at least correct for systematic drift. adjtimex can optionally adjust the system clock using the CMOS clock as a reference, and can log times for long-term estimation of drift rates. 
ADL
Adventure Description Language 
ADL
[international conference on the] Advances in Digital Libraries (IEEE) 
ADLC
Asynchronous Data Link Control 
ADM
Add-Drop-Multiplexer 
ADMA
Area Division Multiple Access (mobile-systems) 
ADMD
ADministration Management DOMAIN (X.400) 
admesh
processing triangulated solid meshes Currently, ADMesh only reads the STL file format that is used for rapid prototyping applications, although it can write STL, VRML, OFF, and DXF files. Some features of admesh are: Fill holes in the mesh by adding facets. Repair facets by connecting nearby facets. Repair normal directions (i.e. facets should be CCW) Remove degenerate facets (i.e. facets with 2 or more vertices equal) Web site: http://www.varlog.com/products/admesh/ 
ADMF
??? (UMTS) 
admin
/ad-min'/ n. Short for `administrator'; very commonly used in speech or on-line to refer to the systems person in charge on a computer. Common constructions on this include `sysadmin' and `site admin' (emphasizing the administrator's role as a site contact for email and news) or `newsadmin' (focusing specifically on news). Compare postmaster, sysop, system mangler. 
admin
short for administrator, referring to the systems person responsible for the maintenance of a computer. 
ADMS
Access Device Messaging Specification (banking, Visa) 
ADMT
Active Directory Migration Tool (MS, AD) 
admwebuser
Manage Squid or Web users using a Web browser This utility allows you to manage Squid or Web users using only a simple Web browser. All the management tasks, including creating, changing, removing, enabling and disabling users can be performed through an easy-to-use Web interface. This package is also know as admuser but it was agreed that admwebuser would be a better package name to be used instead. 
ADN (Advanced Digital Network)
Usually refers to a 56Kbps leased-line. 
ADO
ActiveX Data Objects (ASP, ODBC, MS, IIS) 
ADONIS
ADvanced On-Screen Information System, "AdonIS" 
ADP
Administrative Data Processing 
ADP
Advanced Data Processing 
ADP
Automatic Data Processing (ADP) 
ADPCM
Adaptive Delta Pulse Code Modulation 
ADPE
Automatic Data Processing Equipment (ADP) 
ADPLO
Automated Data Processing Liaison Office (ADP) 
ADPS
Automatic Data Processing System (ADP) 
ADPT
Automated Data Processing/Telecommunications (ADP), "ADP/T" 
ADR
Advanced Digital Recording (Streamer, Philips, OnStream) 
ADS
Advanced Digital System 
ADS
Application Development System 
ADS
Automatic Distribution System 
ADS
Automatic Documenting System (LAN) 
ADS
Auxiliary Data System 
ADSI
Active Directory Service Interface (MS, COM, AD) 
ADSIA
Allied Data Systems Interoperability Agency (org., NATO, mil.) 
ADSL
Asymmetric Digital Subscriber Line [technology] (BELLCORE, AT&T, DSL, ADSL) 
ADSL
Asymmetric Digital Subscriber Loop is a high-speed Internet access technology that uses a commonly available telephone copper loop. ADSL provides data speeds from 384kbps to 1.5 Mbps, normally using different speeds for the upstream and downstream channel (hence the " Asymmetric" ). ADSL provides a direct, dedicated pipe to an ISP. 
ADSL
Asymmetric Digital Subscriber Loop [modulation] 
ADSP
Advanced Digital Signal Processor (DSP) 
ADSP
Appletalk Data Stream Protocol (Apple, AppleTalk) 
ADSR
Attack, Decay, Sustain, Release [generator] (VCA, audio) 
ADSU
ATM Data Service Unit (ATM) 
ADT
Abstract Data Type 
ADT
Access Developer's Toolkit (MS, DB, Windows) 
ADT
Application Data Type 
ADT
Application Development Tools (IBM, AS/400) 
ADT
Atlantic Daylight Time [-0300] (TZ, AST) 
ADU
Automatic Dialing Unit 
ADUA
Administrative Directory User Agent 
ADV
Automatisierte DatenVerarbeitung 
ADV
staatliche Akademie fuer DatenVerarbeitung (org., Uni Boeblingen, Germany) 
advanced configuration and power interface (ACPI)
An industry specification that lets an operating system control power management and configuration to PC and server components. 
advanced graphics port (AGP)
Hardware interface for the acceleration of graphics to a display such as a monitor. AGP video cards display three-dimensional graphics faster than peripheral component interconnect (PCI) cards. 
advanced power management (APM)
Legacy power control and configuration specification for hardware in PCs and servers. APM as a standard has been replaced by ACPI. 
Advanced Technology Attachment Packet Interface (ATAPI)
A system-level component interface used to connect CD-ROMs and tape drives to PCs and servers, as defined by the enhanced integrated drive electronics (EIDE) specification. 
ADVENT
/ad'vent/ n. The prototypical computer adventure game, first designed by Will Crowther on the PDP-10 in the mid-1970s as an attempt at computer-refereed fantasy gaming, and expanded into a puzzle-oriented game by Don Woods at Stanford in 1976. (Woods had been one of the authors of INTERCAL.) Now better known as Adventure or Colossal Cave Adventure, but the TOPS-10 operating system permitted only six-letter filenames. See also vadding, Zork, and Infocom. This game defined the terse, dryly humorous style since expected in text adventure games, and popularized several tag lines that have become fixtures of hacker-speak: "A huge green fierce snake bars the way!" "I see no X here" (for some noun X). "You are in a maze of twisty little passages, all alike." "You are in a little maze of twisty passages, all different." The `magic words' xyzzy and plugh also derive from this game. Crowther, by the way, participated in the exploration of the Mammoth & Flint Ridge cave system; it actually has a `Colossal Cave' and a `Bedquilt' as in the game, and the `Y2' that also turns up is cavers' jargon for a map reference to a secondary entrance. ADVENT sources are available for FTP at ftp://ftp.wustl.edu/doc/misc/if-archive/games/source/advent.tar.Z. There is a Colossal Cave Adventure page. 
advi
a DVI previewer and presenter written in Objective Caml Active-DVI is a DVI previewer and presenter written in Objective Caml (http://caml.inria.fr/ocaml/) with some eye candy effects for presentation, support for interactive demonstrations, and embedding of arbitrary applications within the presentation (hence the Active adjective of the presenter :). Active-DVI does not (yet) support postscript fonts (see the README.Debian for more details). Active-DVI also has the ability to run embedded commands, which may cause security problems when viewing untrusted DVI files. make sure to read the README.Debian for more information 
ADVS
Automatisiertes DatenVerarbeitungsSystem 
ADX
Automatic Data eXchange 
AE
Apple Events (Apple) 
AE
Application Entity / Environment / Execution / Engineering (APE) 
AEA
American Electronics Association (org., USA) 
AEA
Asynchroner EmulationsAdapter (IBM) 
AEB
Analog Expansion Bus 
AEC
Advanced Error Correction (CD) 
aee
An easy to use screen-based editor aee (advanced easy editor) is intended to be an easy to use screen-based editor that requires no instruction to use. Its interface is highlighted by simple pop-up menus, which makes it easy for the users to carry out tasks without remembering the commands. 
AEF
Access control Enforcement Function 
AEGIS
Advanced Electronic Guidance and Instrumentation System 
aegis
Advanced software management tool. Aegis integrates standard software tools such as gcc and cvs into an easy to use, extensible software management system. Aegis simplifies the problems associated with multiple developers and development trees using a transaction-based approach to version control, along with a web-browsable repository and an integrated testing mechanism. See aegis-doc for documentation, aegis-tk for a TK based user interface, and aegis-web for a web based user interface. 
AEI
Application Enabling Interface (IBM) 
AEI
Automatic Equipment Identification 
AEIMP
Apple Event Interprocess Messaging Protocol (Apple) 
AEM
Automatic Emulation Management (Brother) 
AEOM
Apple Events Object Model (Apple) 
AEPIA
Asociacion Espanola Para la Inteligencia Artificial (org., Spain, AI) 
aeromail
Web-based e-mail client. AeroMail is a web-based e-mail client noted for its elegant interface. Other highlights include: - attachments - images - cookie-free http authentication. It is written in PHP using PHP's built in IMAP functions. Details at http://cushman.net/projects/aeromail/index.php 
AES
Advanced Encryption Standard (cryptography) 
AES
Application Environment Service / Specification (OSF) 
AES
Automatic Emulation Switching (Lexmark) 
AES (Advanced Encryption Standard, Rijndael)
The United States encryption standard that replaces the older/weaker DES standard. Contrast: The main impetus behind AES to replace DES is the support for larger key sizes. DES uses 56-bit keys, which can be cracked in just a few minutes (in the year 2001). In contrast, AES supports 128-bit keys (as well as 192-bit and 256-bit). Whereas both DES and AES are fundamentally block-ciphers, AES is also designed to be an efficient stream-cipher and hash algorithm. Whereas DES was designed to be hardware based (software implementations are much slower), AES has been designed to be efficient in both software and hardware. In particular, implementations in ANSI C, Java, and x86 assembly language were important. Another important criteria was the ability for the algorithm to work within smart-cards with slow CPUs and limited memory. Key point: The NIST director in charge of selecting the AES algorithm says: "If Moore's law continues and quantum computing doesn't manifest itself, then I think this system will have a good 30 year run". Misconception: AES does not replace DES. In the 1980s, DES was the most used encryption algorithm. However, due to length of time it took the government to come up with a replacement standard, other encryption algorithms became widely used, such as RC2, RC4, Blowfish, IDEA, and Triple DES. Moreover, crypto has became very "pluggable", with many products supporting numerous simultaneous encryption algorithms. 
AESEBU
Auto Engineering Society/European Broadcasting Union (Digital audio), "AES/EBU" 
AETE
Apple Event Terminology Extension (Apple) 
aethera
Email and PIM application for KDE Aethera is a pim application, i.e. it handles all kinds of personal information: email, contacts, notes, tasks, todos, journals. 
AEUT
Apple Event User Terminology (Apple) 
aewm
a minimalist window manager for X11 aewm is a minimalist window manager for X11. It has no nifty features, but is light on resources and extremely simple in appearance. It should eventually make a good reference implementation of the ICCCM. A few separate programs are included to handle running programs, switching between windows, etc. 
aewm++
minimal window manager written in C++ aewm++ is a minimal window manager for X11, based on aewm. It keeps aewm's minimalist look and feel but is written in C++, and adds some modern features like virtual desktops and partial GNOME support. Also included with this package: * appbar: a small application launcher * aewm++_fspanel: a very small panel * setrootimage: draws a gradient on the X root window * aewm++_xsession: keeps an X session alive 
af
An Emacs-like mail reader and composer. Af is a standalone mail reader which has an Emacs-like interface by default. It has good facilities for handling folders, and commands for handling groups of messages in a single operation. Af is aimed primarily at Emacs users and people who deal with large amounts of mail daily, but other people have found it useful too. 
AF
Auxiliary carry Flag (assembler) 
AFAIC
As Far As I'm Concerned (slang, Usenet, IRC) 
AFAICR
As Far As I Can Recall (DFUe, Usenet, IRC) 
AFAICT
As Far As I Can Tell (DFUe, Usenet, IRC) 
AFAIK
As Far As I Know (slang, Usenet, IRC) 
AFAIR
As Far As I Recall / Remember (slang, Usenet, IRC) 
AFAMPE
[u.s.] Air Force Automated Message Processing Exchange (org., USA. mil.) 
afbackup
Client-Server Backup System (Server side) This is a client-server backup system offering several workstations a centralized backup to a special backup server. Backing up only one computer is easily possible, too. Any streaming device can be used for writing the data to it, usually this will be a tape device. Writing backups is normally done sequentially: The next writing to tape goes to the end of the previous write no matter where you have restored from in the meantime. Features: - Authentication of the client is performed before it can take over control - Access restriction for the streamer device -> security - Client-side per-file compression -> reliability - Data stream is written to tape in pieces -> fast finding of files - Tape position logging for each file - Tape capacity is fully used - Full / incremental backups - Raw partitions can be backed up - Client and Server buffering for maximal throughput is done Note: Tk is required if you want to use the graphical configuration tool instead of the text configuration tool. 
AFC
AntiFerromagnetically Coupled [technology] (IBM, HDD) 
AFC
Application Foundation Classes (MS, GUI, Java) 
AFC
Automatic Font Change 
AFCET
Association Francaise pour la Cybernetique Economique et Technique (org., France) 
AFD
Automatic File Distribution 
AFE
Apple File Exchange (Apple) 
AFEB
AFrican EDIFACT Board (org., EDIFACT), "AF/EB" 
affiche
application to "stick" little notes on the desktop. Affiche is a little application that allows people to "stick" little notes on their computer desktop. It was made for the GNUstep environment. 
AFI
Authority and Format Indicator (NSAP, IDP) 
AFI
Authority Frame Identifier 
AFII
Association for Font Information Interchange (org., USA) 
AFIN
Air Force Information Network (network, USA, mil.) 
afio
Archive file manipulation program. Afio manipulates groups of files, copying them within or between filesystems and an afio archive. Afio archives are portable as they contain only ASCII-formatted header information. Afio makes cpio-format archives. Afio deals somewhat gracefully with input data corruption. Afio supports multi-volume archives during interactive operation. Afio can make compressed archives that are much safer than compressed tar or cpio archives. Afio is best used as an `archive engine' in a backup script. 
AFIS
AutomatisiertesFingerabdruck-InformationsSystem (INPOL) 
AFK
Away from Keyboard (slang, Usenet, IRC) 
afm2tfm
convert Adobe font metrics to TeX font metrics 
AFNET
Air Force Network (network, USA, mil.) 
AFP
Advanced Function Presentation (IBM) 
AFP
Appletalk Filing Protocol (Apple, AppleTalk) 
AFPA
Advanced Function Printing Architecture (IBM) 
AFPDS
Advanced Function Printing Data Stream (IBM) 
AFT
Authenticated Firewall Traversal (IETF) 
afterstep
A window manager with the NEXTSTEP look and feel. AfterStep is a window manager based on FVWM which attempts to emulate the NEXTSTEP look and feel, while retaining the configurability of its predecessor. Note that this window manager makes extensive use of the color palette. If you have only an 8-bit color display, it will run as packaged, but you may want to modify the configuration to use fewer colors. AfterStep is a continuation of the BowMan window manager project, but the name was changed to reflect the desire that it do more than simply emulate and become a valuable window manager in its own right. 
AfterStep
One of several user interfaces (window managers), AfterStep makes Linux look and feel much like NeXTSTEP, with enhancements. For more on AfterStep, go to www.afterstep.org. (Also, see Enlightenment, GNOME, KDE, and X Window System.) 
AFTP
Anonymous File Transfer Protocol (FTP) 
AFUU
Association Francaise des Utilisateurs d'Unix (org., France, Unix) 
AGA
Advanced Graphics Adapter 
agbrowser
The KDE2 frontend to the AudioGalaxy Linux client. AGBrowser is a program to complement the official satellite program for Linux from AudioGalaxy. By using AGBrowser, every dependency on another program to search for, download, share, and manage mp3s has been satisfied. AGBrowser requires the use of the non-open, non-free AudioGalaxy Satellite software. The installer is available as a Debian package, agsatellite. 
AGC
Automatic Gain Control (audio) 
AGCH
Access Grant CHannel (GSM, CCCH, mobile-systems) 
Agenda-VR
there are two versions of the VR3d. One was released in December 2000 in the U.S., and the "Second Edition" was released in January 2001 in the U.S. and in Germany. Agenda Computing was scheduled to complete development in the spring of 2002, but their website seems to have disappeared [July 22, 2002]. Handhelds/PDA based distribution. 
AGEP
ArbeitsGemeinschaft Elektronisches Publizieren [e.v.] (org., DTP), "AgEP" 
AGF
Arbeitsgemeinschaft der GrossForschungseinrichtungen [deutschlands] (org.) 
AGFMB
ArbeitsGemeinschaft Freier MailBoxen (org.) 
aggregate
CIDR network aggregation and filtering aggregate is a tool for aggregating CIDR networks. Input is read from stdin and output is written to stdout. It understands IPv4 networks represented as network/prefix, network/netmask and start_address - end_address. It is able to read input in any one of these formats and output in the same or a different format. It is also able to limit the maximum and minimum prefix length that will be output. This can be used to filter, for instance ignoring all networks with a prefix longer than 24 bits. That is all networks smaller than a traditional Class C. 
AGNS
AT&T Global Network Services (AT&T) 
AGP
Advanced / Accelerated Graphics Port (Intel, MMX, AGP) 
agsatellite
Audiogalaxy Satellite (installer) The Audiogalaxy Satellite is a small and simple program that allows you to share your music with friends and other users on Audiogalaxy. Audiogalaxy does not allow redistribution of their software. Therefore, this package requires the user to fetch the Audiogalaxy Satellite separately from their web site. When you install this package you will be guided through that process. This package installs the file AGSatellite0520-glibc21.tar.gz from the www.audiogalaxy.com website (look for "Download Satellite"). 
AH
[IP] Authentication Header (IPSEC, IPV6, RFC 1826, VPN) 
AHIMA
American Health Information Management Association (org., USA) 
AHP
Analytical Hierachy Process 
AHPCRC
Army High Performance Computing Research Center (org., USA, HPC) 
AI
/A-I/ n. Abbreviation for `Artificial Intelligence', so common that the full form is almost never written or spoken among hackers. 
AI
Adobe Illustrator (Adobe) 
AI
Artificial Intelligence 
AIA
Application Integration Architecture 
AIBO
Artificial Intelligence roBOt (Sony, AI) 
AIC
AIX windows Interface Composer (AIX, IBM) 
AIC
[SRI] Artificial Intelligence Center (SRI, AI) 
AICA
Associazione Italiana per l'Informatica ed il Calcolo Automatico (org., Italy) 
AID
Application IDentifier (APDU) 
AID
Attention Interrupt ??? [key] (IBM) 
AID
AUTODIN Interface Device (AUTODIN, mil., USA) 
AIDA
Aktuelle Informationen in Deutsch zum Amiga (AC, Amiga) 
AIDAT
African Internet Development Action Team (org., Internet) 
aide
Advanced Intrusion Detection Environment AIDE creates a database from the regular expression rules that it finds from the config file. Once this database is initialized it can be used to verify the integrity of the files. It has several message digest algorithms (md5,sha1,rmd160,tiger,haval,etc.) that are used to check the integrity of the file. More algorithms can be added with relative ease. All of the usual file attributes can also be checked for inconsistencies. You will almost certainly want to tweak the configuration file in /etc/aide/aide.conf. See manual.html for information on this file. 
AIDS
Automatic Installation and Diagnostic Service 
AIFF
Audio Interchange File Format 
AII
Active Input Interface (UNI, PMD, FDDI) 
AIIA
Associazione Italiana per l'Intelligenza Artificiale (org., Italy, AI) 
AIIM
Association for Information and Image Management (org., USA) 
AIM
Advanced Invar Mask (Display, ViewSonic) 
AIM
Alternate Input Method (OS/2) 
AIM
AOL Instant Messenger [protocol] (AOL) 
AIM
Apple, IBM, Motorola [consortium] (Apple, IBM, Motorola, org.) 
AIM
Association of Imaging Manufacturers (org.) 
AIM
ATM / Ascend Inverse Multiplexing [protocol] (ATM) 
AIM
Automatic Interface Management (Brother) 
AIMD
Additive-Increase Multiplicative-Decrease (TCP) 
aime
Advanced Interactive Mudding Environment A MUD/Multi-user participatory environment server with a built-in builder port for straight-forward world creation, an online interpreted scripting engine for game logic, and an extremely flexible track-based level/quest/profession system. 
AIMS
Apple Internet Mail Server (Apple) 
AIMSRCF
Association of Imaging Manufacturers ??? /Shared Resource Control Facility (Fujitsu), "AIM/SRCF" 
AIN
Advanced Intelligent Network (IN) 
AIN
Auto Insert Notification (CD-R) 
AIO
Asynchronous Input/Output 
AIP
Association of Internet Professionals (org., Internet) 
AIP
Associazione Informatici Professionisti (org., Italy) 
AIP
ATM Interface Processor (ATM) 
AIR
Automatic Image Refinement (Canon), "A.I.R." 
airsnort
WLAN sniffer A wireless LAN (WLAN) tool which cracks encryption keys on 802.11b WEP networks. AirSnort operates by passively monitoring transmissions, computing the encryption key when enough packets have been gathered. 
AIRTC
[international symposium on] Artificial Intelligence in Real-Time Control (IFAC, IFIP, IMACS, conference) 
AIS
Account Information Security 
AIS
Alarm Indication Signal (UNI, ATM, OAM, DS3/E3) 
AIS
Applied Information Sciences (manufacturer) 
AIS
Applied Information Systems (manufacturer) 
AIS
Arbeitgeber-Informations-Service (WWW) 
AIS
Automated Information System 
AISB
Association of Imaging Service Bureaus (org.) 
AISE
Alarm Indication Signal-External (UNI, ATM), "AIS-E" 
aish
ish/base64/uuencoded_file converter Aish is a file converter, which can encode binary files to ascii text as ish/base64/uuencoded_file. Aish can also decode them. 
AISIG
[south australian] Artificial Intelligence Special Interest Group (org., Australia, AI) 
AISP
Association for Internet Service Providers (org., USA, ISP) 
AISP
Association of Information Systems Professionals (org., USA) 
AISSO
Automated Information Systems Security Officer (mil., USA) 
AIST
Agency of Industrial Science and Technology (org., Japan) 
AIT
Advanced Intelligent Tape (Sony, Streamer) 
AIT
Angewandte InformationsTechnik [verlags gmbh] (manufacturer) 
AITEC
[research institute for] Advanced Information TEChnology (org., Japan) 
AITO
Association Internationale pour les Technologies Objets (org.) 
AIUI
As I Understand It (slang, Usenet, IRC) 
AIW
All In Wonder [graphic card] (ATI) 
AIW
APPN Implementers Workshop (org., APPN) 
AIX
Advanced Interactive eXecutive (IBM, Unix, OS) 
AIXESA
Advanced Interactive eXecutive/Enterprise Systems Architecture (IBM, AIX), "AIX/ESA" 
AJBS
Association of Japanese Business Studies (org., Japan) 
AK
Application Kit (NextStep, OpenStep, Apple, Rhapsody) 
AKA
Also Known As 
AKI
Arbeitsgemeinschaft der deutschen KI Institute (org., KI) 
Akkerman, Wichert
one of the key developers of the Debian distribution. Wichert has also written important Linux programs such as strace and APT. 
AL
Artificial Life 
AL
Assembly Language 
alamin-client
Alamin GSM SMS Gateway client Client part of the Alamin GSM SMS Gateway. Used to send commands local or remotely to the gateway server (send a message, query a queue status, etc.). 
alamin-server
Alamin GSM SMS Gateway server Server part of the Alamin GSM SMS Gateway. This gateway allows you to send SMS messages over a GSM network, and receive SMS messages and run a program (called input message processor, IMP) to process the incoming message. 
ALAN
Audio Local Area Network (audio), "A-LAN" 
ALAP
Appletalk Link Access Protocol (Apple, AppleTalk) 
ALAP
As Late As Possible (slang, Usenet) 
alarmd
KDE Alarm daemon. 
ALC
Adaptation Layer Controller (ATM) 
ALC
Arithmetic and Logic Circuits (IC) 
ALC
Automatic Level Control 
alchemist
The alchemist is a back-end configuration architecture. Alchemist provides multi-sourced configuration at the data level, postponing translation to native format until the last stage. It uses XML for intermediary data encoding, and can be extended to arbitrarily large configuration scenarios. 
Alcolix
alcolix is a minimal Linux rescue distribution with the goals of being small, compatible, and very usable. It has a cozy shell and a multitude of partition rescue/editing tools, all based on up-to-date releases (e.g., 2.4.x kernel with USB support). It uses cpio.bz2 data disks and has a full GRUB bootloader, memtest86, and more. Version 2.4.20 BETA3 was released June 16, 2003. A 'special purpose/mini' distribution. 
alcovebook-sgml
Alcove customisation of the DocBook DTD and stylesheets This includes the AlcoveBook DTD (generic, still to be refined into several other DTDs), and the Alcove DSSSL stylesheets, which currently include: - a generic extension over Norman Walsh's modular stylesheets - a book-like style for article - an improved article style (still somewhat experimental) It integrates smoothly within the sgml2x framework. 
ALDC
Adaptive Lossless Data Compression (IBM) 
ALE
Address Lifetime Expectation (org., IETF, IP) 
ALE
Application Link Enabling (R/3, SAP) 
ALE
Atlanta Linux Enthusiasts (Linux, user group) 
ALE
Atomic Layer Epitaxy (IC) 
ALEC
Authorized Linux Education Center (Linux, Caldera) 
aleph
The Aleph programming language - runtime Aleph is a multi-threaded functional programming language with dynamic symbol bindings that support the object oriented paradigm. Aleph has a rich set of features providing runtime compatibility with C++. The engine runs on both 32 bits and 64 bits platforms. It is designed to be portable across platforms. This package contains the runtime binaries & libraries. 
Aleph ARMlinux
Aleph One provides well-documented Linux distributions for various ARM-based systems. LWN distribution survey results for February 6, 2000. 
alevt
X11 Teletext/Videotext browser AleVT is an X11 program for browsing and searching Teletext/Videotext pages received by a compatible decoder (at the moment, bttv). Features include: * Multiple windows * Page cache * Regular expression searching * Built-in manual Additional command line utilities can * receive the time from Teletext/Videotext * capture pages and write them to disk Teletext/Videotext is used by TV channels to transmit textual information pages (it's transmitted via non-visible scan lines). Bttv is a driver for frame grabber cards using the Bt848 family of video decoder chips. It is included in the Linux kernel starting with version 2.2 or available separately from http://bytesex.org/bttv/ Homepage: http://www.goron.de/~froese/ 
ALGOL
ALGOrithmic Language 
algorithm
A series of rules/procedures for solving a mathematical or logical problem. From an infosec point of few, the most interesting mathematical problems are those of cryptography. Cryptographic algorithms of interest are those for encrypting messages or generating unique hashes. Analogy: An cookbook recipe is an algorithm. Key point: Different algorithms have different levels of complexity. For example, consider the ancient parable (Babylonian?) about a king and a wise subject who did a favor for him. The subject asked for one piece of grain to be placed on the first square of a chess board, two grains on the second, four grains on the third, and so on, doubling the amount of grain for each successive square. This problem demonstrates an algorithm of exponential complexity. For the first 10 squares of the chess board, the series is: 1 2 4 8 16 32 64 128 256 512. Thus, for the first 10 squares, roughly a thousand grains must be paid out. However, the series continues (using K=1024): 1k 2k 4k 8k 32k 64k 128k 256k 512k. Thus, for the first 20 squares, roughly a million grains must be paid out. After 30 squares, roughly a billion grains must be paid out. For 40 squares, roughly a trillion grains must be paid out. This is directly related to such things as key size. A 41-bit key is twice as hard to crack as a 40-bit key. A 50-bit key is a thousand times harder. A 60-bit key is a million times harder. This is why the 128-bit vs. 40-bit encryption debate is so important: 128-bit keys are a trillion trillion times harder to crack (via brute force) than 40-bit keys. Key point: Most algorithms are public, meaning that somebody trying to decrypt your message knows all the details of the algorithm. Consequently, the message is protected solely by the key. Many people try to add additional protection by making the details of the algorithm secret as well. Experience so far has led to the belief that this actually leads to weaker security for two reasons. First, such secrets always get discovered eventually, so if security depends upon this secret, it will eventually be broken. Secondly, human intelligence is such that someone cannot create a secure algorithm on his/her own. Therefore, only by working with a community of experts over many years can humans create a secure algorithm. To date, only two such communities exist: the entire world of cryptography experts publishing the details of their work and trying to break other people's work, and the tightly knit community of cryptography experts working in secret for the NSA. 
Alias
A secondary or symbolic name for a file, a collection of data, or a computer device. In a spreadsheet, a range name, such as Income, is an alias for a range, such as A3..K3. In networks, group aliases provide a handy way to send electronic mailed two or more people simultaneously. 
alias
An alternate name, or abbreviation, used in place of a command or a sequence of commands in the C shell and the Korn shell. 
alias
An alternate name, symbolic link, network configuration, or icon that points to a corresponding file or directory location. Aliases are useful for concatenating long strings or commands into shorter, less complex names. 
alias
The word alias is used for many different things within infosec. In all its definitions, it generally means somesort of alternate name for something. Some definitions used for alias are: e-mail alias
alicq
Flexible ICQ client in pure Tcl/Tk Alicq is pure Tcl/Tk implementation of ICQ client with flexible modularized architecture, support for ICQ2000/Oscar protocol, and ability to pick up Licq configuration files and user database. Why would you use it? It is small, about 2500 lines as of release 0.6. It is modular and extendable in best tradition of the Tcl scripting language. New modules are easy to write, and dozen lines Tcl module can do a lot. It is crossplatfrom: works on Unix, Windows, Macintosh, and on any other system supported by Tcl/Tk. 
alien
install non-native packages with dpkg Alien allows you to convert LSB, Red Hat, Stampede and Slackware Packages into Debian packages, which can be installed with dpkg. It can also generate packages of any of the other formats. This is a tool only suitable for binary packages. 
Alindis
A comprehensive guide to building a GNU/Linux distribution. Initial version 0.0.1 was released January 2, 2002. Version 0.1.0 was released July 18, 2002. 
ALIWEB
Archie Like Indexing in the WEB (WWW) 
ALK
Automatisierte LiegenschaftsKarte (ALTIS) 
allcm
force the most important Computer-Modern-fonts to be calculated 
allec
force the most important Computer-Modern-fonts to be calculated 
allegro-demo
cool game, demonstrating power of the Allegro library This game is distributed with the Allegro library and shows a new Allegro programmer the power of this lib. But it is more than an usual feature demo, it is fully playable and may make some fun... 
Allison, Jeremy
one of the lead developers of the Samba Windows file-and-print-sharing software. 
Allman, Eric
the creator of sendmail -- one of the most important pieces of software ever created by the OpenSource community. Eric has established Sendmail, Inc., which produces both open-sourced and proprietary versions of sendmail. 
allneeded
force the calculation of all fonts now needed 
allow_null_glob_expansion
If set, bash allows pathname patterns which match no files (see Pathname Expansion below) to expand to a null string, rather than themselves. 
ALM
Application / Appware Loadable Module (Novell, Netware) 
ALM
Asynchronous Line Module 
ALM
Asynchronous Line Multiplexer 
alml
This package provides a SGML typesetting system. Alml is a SGML typesetting system developed for a big italian document: "Appunti di informatica libera". Alml is made for very big documentation projects, and can generate PDF, PostScript, HTML and pure text output. 
ALOE
Apple Library for Object Embedding (Apple, OpenDoc) 
ALP
Assembly Language Processor (IBM) 
Alpha
a family of advanced RISC-based, 64-bit CPUs from Digital (now Compaq). Alpha's were introduced back in 1992. 
alpha software
The term used to describe an early release of software that will have many bugs and features missing. See beta software. 
ALR
Advanced Logic Research, inc (manufacturer) 
ALS
Adjacent Link Station (IBM) 
ALSA
Advanced Linux Sound Architecture (Linux) 
ALSA
The ALSA sound driver was originally written as a replacement for the Linux kernel sound for Gravis UltraSound (GUS) cards. As this GUS replacement proved to be a success, the author started the ALSA project for a generic driver for several sound chips, with fully modularized design. It is compatible with the OSS/Free and OSS/Linux sound drivers (the drivers in the kernel), but has its own interface that is even better than the OSS drivers. A list of features can be found at http://www.alsa-project.org/intro.html. The main page of the ALSA project is http://www.alsa-project.org/ From ALSA-HOWTO The ALSA sound drivers have proven to be such a success that they have replaced the OSS drivers in the Linux kernel. From Binh
alsaconf
ALSA configurator This is configurator for ALSA driver. Run it, if you need configure your sound card. 
alsaplayer
PCM player designed for ALSA Alsaplayer is a PCM player designed specifically for use with ALSA, but works great with OSS or EsounD. It's heavily threaded which cuts down on skipping, offers optional and even simultaneous visual scopes, plays mp3, mp2, ogg, cdda, audiofs, and lots more. This empty package provides an easy transition to either the gtk or text frontends; it may be safely removed once all its dependencies are installed. 
ALSI
Associazione nazionale Laureati in Scienze dell'informazione e Informatica (org., Italy) 
alt
/awlt/ 1. n. The alt shift key on an IBM PC or clone keyboard; see bucky bits, sense 2 (though typical PC usage does not simply set the 0200 bit). 2. n. The `option' key on a Macintosh; use of this term usually reveals that the speaker hacked PCs before coming to the Mac (see also feature key, which is sometimes incorrectly called `alt'). 3. n.,obs. [PDP-10; often capitalized to ALT] Alternate name for the ASCII ESC character (ASCII 0011011), after the keycap labeling on some older terminals; also `altmode' (/awlt'mohd/). This character was almost never pronounced `escape' on an ITS system, in TECO, or under TOPS-10 -- always alt, as in "Type alt alt to end a TECO command" or "alt-U onto the system" (for "log onto the [ITS] system"). This usage probably arose because alt is more convenient to say than `escape', especially when followed by another alt or a character (or another alt and a character, for that matter). 4. The alt hierarchy on Usenet, the tree of newsgroups created by users without a formal vote and approval procedure. There is a myth, not entirely implausible, that alt is acronymic for "anarchists, lunatics, and terrorists"; but in fact it is simply short for "alternative". 
alt bit
/awlt bit/ [from alternate] adj. See meta bit. 
ALT Linux
LWN distribution survey completed May 3, 2002. ALT Linux got its start as a Linux-Mandrake Russian Edition Spring 2001. Designed to be a universal distribution, suitable for server organization, for user workstations and for software development, ALT Linux has diverged from its roots and split into several projects, all with the same code base. For example, there's Castle, a secured, RSBAC-enabled, server distribution; and ALT Linux Junior, a single-disk distribution for home computers, designed especially for beginners, easy to install and use. The unstable Sisyphus branch changes daily. ALT Linux Master 2.2 was released March 7, 2003. ALT Linux Junior 2.2 (Plum) was released March 26, 2003. 
ALTEL
Association of Long-distance TELephone companies (org., USA) 
ALTERNIC
ALTERnative Network Information Center (Internet, USA) 
altgcc
Alternate gcc package for the libc5 environment. This special gcc package works with the libc5-altdev package to build binaries for the old libc5/ld-linux.so.1 environment. It can coexist with the standard libc6 development packages. 
althea
IMAP email client for GTK+ The designers of Althea felt that there wasn't a stable, easy to use, GUI, IMAP (Internet Message Access Protocol) e-mail client for X Windows. The design goal was a stable e-mail client with the richness of usability of Microsoft's Outlook, Qualcomm's Eudora, and Cyrusoft's Mulberry. This package was built without SSL support. If you want SSL support, use the althea-ssl package, which is available in non-US, instead. Check the documentation at /usr/share/doc/althea/help.html before filing a bug report. 
ALTS
Association for Local Telecommunications Services (org., USA) 
ALU
Arithmetic and Logic Unit (CPU) 
AM
Active Matrix (LCD) 
AM
Amplitude Modulation 
AM
Asynchronous Mode 
am-utils
The 4.4BSD automounter. Amd is an automounter--it mounts file systems "on demand" when they are first referenced and unmounts them after a period of inactivity. 
AMA
Automatic Message Accounting 
AMACS
AMA Collection System (AMA) 
amanda-client
Advanced Maryland Automatic Network Disk Archiver (Client) Amanda is a backup system designed to archive many computers on a network to a single large-capacity tape drive. This package is suitable for large amounts of data to backup. For smaller solutions take a look at afbackup, tob, taper, ... Features: * will back up multiple machines in parallel to a holding disk, blasting finished dumps one by one to tape as fast as we can write files to tape. For example, a ~2 Gb 8mm tape on a ~240K/s interface to a host with a large holding disk can be filled by Amanda in under 4 hours. * built on top of standard backup software: Unix dump/restore, and later GNU Tar and others. * does simple tape management: will not overwrite the wrong tape. * supports tape changers via a generic interface. Easily customizable to any type of tape carousel, robot, or stacker that can be controlled via the unix command line. * for a restore, tells you what tapes you need, and finds the proper backup image on the tape for you. * recovers gracefully from errors, including down or hung machines. * reports results, including all errors in detail, in email to operators. * will dynamically adjust backup schedule to keep within constraints: no more juggling by hand when adding disks and computers to network. * includes a pre-run checker program, that conducts sanity checks on both the tape server host and all the client hosts (in parallel), and will send an e-mail report of any problems that could cause the backups to fail. * can compress dumps before sending or after sending over the net, with either compress or gzip. * can optionally synchronize with external backups, for those large timesharing computers where you want to do full dumps when the system is down in single-user mode (since BSD dump is not reliable on active filesystems): Amanda will still do your daily dumps. * lots of other options; Amanda is very configurable. THIS PACKAGE RELIES ON A RUNNING AMANDA SERVER IN YOUR NETWORK. For a quick start read the README.client.debian in /usr/share/doc/amanda-client. Explanation of suggested programs: - awk and gnuplot are needed for plotting statistics of backups 
amanda-common
Advanced Maryland Automatic Network Disk Archiver (Libs) This package contains libraries required by the amanda client and server packages. 
amanda-server
Advanced Maryland Automatic Network Disk Archiver (Server) Amanda is a backup system designed to archive many computers on a network to a single large-capacity tape drive. This package is suitable for large amounts of data to backup. For smaller solutions take a look at afbackup, tob, taper, ... Features: * will back up multiple machines in parallel to a holding disk, blasting finished dumps one by one to tape as fast as we can write files to tape. For example, a ~2 Gb 8mm tape on a ~240K/s interface to a host with a large holding disk can be filled by Amanda in under 4 hours. * built on top of standard backup software: Unix dump/restore, and later GNU Tar and others. * does simple tape management: will not overwrite the wrong tape. * supports tape changers via a generic interface. Easily customizable to any type of tape carousel, robot, or stacker that can be controlled via the unix command line. * for a restore, tells you what tapes you need, and finds the proper backup image on the tape for you. * recovers gracefully from errors, including down or hung machines. * reports results, including all errors in detail, in email to operators. * will dynamically adjust backup schedule to keep within constraints: no more juggling by hand when adding disks and computers to network. * includes a pre-run checker program, that conducts sanity checks on both the tape server host and all the client hosts (in parallel), and will send an e-mail report of any problems that could cause the backups to fail. * can compress dumps before sending or after sending over the net, with either compress or gzip. * can optionally synchronize with external backups, for those large timesharing computers where you want to do full dumps when the system is down in single-user mode (since BSD dump is not reliable on active filesystems): Amanda will still do your daily dumps. * lots of other options; Amanda is very configurable. For a quick start read the README.server.debian in /usr/share/doc/amanda. Explanation of suggested programs: - perl is needed for some non essential server utilities - awk and gnuplot are needed for plotting statistics of backups - to backup the tape server, you need to install the client too - /usr/bin/Mail from mailx is used by amcheck to mail info about which tape is needed next, etc 
AMAP
As Much As Possible (DFUe, Usenet, IRC) 
amap
Networt protocol probing tool Amap allows you to probe IP ports for running protocols, ignoring the port number. It does this by sending probe packets to the port and analyzing the responses. This will allow you to find services running on non-standard ports. Having nmap installed is suggested, since amap cannot scan for open ports (but there is an option to import nmap's output). 
AMARC
AMA Recording Center (AMA) 
AMASE
AMA Standard Entry (AMA) 
AMAT
AMA Transmitter (AMA) 
amaterus
GTK+ based window manager AMATERUS is a GTK+ based Window Manager. It has some interesting features like: * It is written with GTK * You can make "window group" and manipulate windows which belong to the group together. * You can edit the title bar strings. * Configuration file has an XML syntax (implementation is not so stable nor complete, though). * You can apply the GTK+ theme to the window manager. 
AMATPS
AMA TeleProcessing System (AMA) 
amavis-postfix
Interface between MTA and virus scanner. AMaViS is a script that interfaces a mail transport agent (MTA) with one or more virus scanners. AMaViS supports MTAs are exim, qmail, postfix, and sendmail, although this version has been built with only postfix support. 
amaya
Graphical HTML Editor from w3.org Amaya is a WYSIWYG HTML Editor, based on the thot toolkit developed at INRIA. 
AMCD
Active Matrix Color Display (AMD, LCD) 
AMCD
Activity Monitoring Completion Detection 
AMD
Active Matrix Display (LCD) 
AMD
Advanced MicroDevices [inc.] (manufacturer) 
AME
Advanced Metal Evaporated [tape] (Seagate, Streamer) 
AME
Advanced Modeling Extension (AutoCAD) 
ame
hosts. These tools will provide you with the IP addresses for given host names, as well as other information about registered domains and network addresses.You should install bind-utils if you need to get information from DNS nameservers. 
AMEL
Active Matrix Electro Luminescent (AMD, LCD) 
American Standard Code for Information Interchange (ASCII)
Alphanumeric characters are represented by numbers ranging from 0 to 127 and are translated into a 7-bit binary code. ASCII allows for easy transfer of text-only files between different kinds of computers. 
AMH
Automated Material Handling 
AMHS
Automated Message Handling System (MHS) 
AMI
Alternate Mark Inversion (ISDN, T1) 
AMI
American Megatrends Incorporation (manufacturer) 
ami
An X input method server for Korean text input Ami is an X input method server for Korean text input. Hangul or Hanja Korean text can be input with Ami, which responds the requests from XIM compliant applications. In this package, Ami has been built as a standalone version and a WindowMaker dock. 
AMI
ATM Management Interface (ForeRunner) 
AMIA
American Medical Informatics Association (org., USA) 
AMIA
Australian Medical Informatics Association (org., Australia) 
AMIC
Apple Memory-mapped I/O Controller (Apple) 
AMIGADE
Amiga Digital Environment (Amiga), "AmigaDE" 
AMIGOS
Advanced Mobile Integration in General Operating Systems 
AMIS
Audio Message Interface Standard 
AML
ACPI Machine Language (ACPI, ASL, BIOS) 
AMLCD
Active Matrix Liquid Crystal Display (AMD, LCD) 
AMMA
Advanced Memory Management Architecture 
AMME
Automated Multi-Media Exchange 
AMNET
Allgemeines Mailbox NETzwerk (BBS, network) 
AMOK
A Modular Operating Kernel (OS, Cray) 
amor
a KDE creature for your desktop AMOR stands for Amusing Misuse Of Resources. It provides several different characters who prance around your X screen doing tricks and giving you tips. This package is part of the official KDE toys module. 
AMOS
Alpha Microsystems Operating System (OS) 
AMPE
Automated Message Processing Exchange 
amphetamine
jump'n run game that offers some unique visual effects Amphetamine is an exciting Jump'n run game that offers some unique visual effects like colored lighting, fogging and coronas. You must fight eleven evil monsters with your magic weapons. 
amplifier
Any type of system on the network that can be used to amplify (increase) the the size of traffic is known as an amplifier. Example: The classic example is the smurf amplifier. An attacker spoofs the address of a victim and sends directed broadcasts to the amplifier, which then sends hundreds of replies back to the victim. Thus, it only costs the attacker a single packet to send many packets to the victim. Example: A more subtle attack is the use of DNS. The DNS response packet can be much larger than the request. This allows an attacker to flood the victim with large packets at the cost of small packets. 
AMPS
Advanced Mobile Phone Service (mobile-systems, Motorola) 
AMR
Audio MODEM Riser [slot] (Intel) 
AMS
Advanced Monitor System (OS, DEC, PDP 9, PDP 15) 
AMS
American Mathematical Society (org., USA) 
AMS
Andrew Mail / Message System (Unix) 
AMS
Asymmetric Multiprocessing System 
AMS
AUTODIN Mail Server (AUTODIN, mil., USA) 
AMSDOS
AMStrad Disk Operating System (Amstrad, OS), "AMS-DOS" 
amstex
structured text formatting and typesetting 
AMT
Active Matrix Technology (AMD, LDC) 
AMT
Apple Media Toolkit (Apple) 
AMTF
Average Modulation Transfer Function 
AMTFT
Active Matrix Thin Film Transistor (AMD, LCD, TFT) 
AMTPE
Apple Media Tool Programming Environment (Apple), "AMT PE" 
AMWG
Architecture Methodology Working Group (org., DISA) 
AN
Access Node 
AN
Alternating Network 
an
Very fast anagram generator. Generates anagrams for a phrase supplied by the user, the words used in the anagram are taken from a specified dictionary which should contain one word per line (default:/usr/share/dict/words). Appears to be up to 10 times faster than wordplay, especially for longer phrases. 
anacron
a cron-like program that doesn't go by time Anacron (like `anac(h)ronistic') is a periodic command scheduler. It executes commands at intervals specified in days. Unlike cron, it does not assume that the system is running continuously. It can therefore be used to control the execution of daily, weekly and monthly jobs (or anything with a period of n days), on systems that don't run 24 hours a day. When installed and configured properly, Anacron will make sure that the commands are run at the specified intervals as closely as machine-uptime permits. This package is pre-configured to execute the daily jobs of the Debian system. You should install this program if your system isn't powered on 24 hours a day to make sure the maintenance jobs of other Debian packages are executed each day. 
anacron
Anacron (like `anac(h)ronistic') is a periodic command scheduler. It executes commands at intervals specified in days. Unlike cron, it does not assume that the system is running continuously. It can therefore be used to control the execution of daily, weekly, and monthly jobs (or anything with a period of n days), on systems that do not run 24 hours a day. When installed and configured properly, Anacron will make sure that the commands are run at the specifiedintervals as closely as machine-uptime permits. This package is pre-configured to execute the daily jobs of the RedHat Linux system. You should install this program if your system is not powered on 24 hours a day to make sure the maintenance jobs ofother Red Hat Linux packages are executed periodically. 
analog
analyzes logfiles from web servers Analog is a fast logfile processor that generates usage statistic reports for your web server. Features: * It's fast. Very fast. It can process millions of lines per minute. * It's very scalable. * It's very flexible. The default output will be satisfactory for most people, but there are hundreds of options producing 32 different reports for those who want to do things differently. * It can output in many different languages, and 4 output formats. * It produces attractive output that complies with the HTML spec (and so can be read on any browser). * It can read logfiles in almost any format. * It can be run at the command line or from a web form interface. 
anarchism
An exhaustive exploration of Anarchist theory and practice. The Anarchist FAQ is an excellent source of information regarding Anarchist (libertarian socialist) theory and practice. It covers all major topics, from the basics of Anarchism to very specific discussions of politics, social organization, and economics. 
ANBU
ANlagenBUchhaltung 
ANCS
AT&T Netware Connect Services (AT&T, Netware) 
and
Auto Nice Daemon The auto nice daemon activates itself in certain intervals and renices jobs according to their priority and CPU usage. Jobs owned by root are left alone. Jobs are never increased in their priority. The renice intervals can be adjusted as well as the default nice level and the activation intervals. A priority database stores user/group/job tuples along with their renice values for three CPU usage time ranges. Negative nice levels are interpreted as signals to be sent to a process, triggered by CPU usage; this way, Netscapes going berserk can be killed automatically. The strategy for searching the priority database can be configured. AND also provides network-wide configuration files with host-specific sections, as well as wildcard/regexp support for commands in the priority database. 
ANDF
Architecture Neutral Distribution Format (OSF) 
ANFSCD
And Now For Something Completely Different (slang, Usenet, IRC) 
angle brackets
n. Either of the characters < (ASCII 0111100) and > (ASCII 0111110) (ASCII less-than or greater-than signs). Typographers in the Real World use angle brackets which are either taller and slimmer (the ISO `Bra' and `Ket' characters), or significantly smaller (single or double guillemets) than the less-than and greater-than signs. See broket, ASCII. 
ANHR
Access Node Hub Router (AN) 
ANI
Automatic Number Identification 
animals
Traditional AI animal guessing engine using a binary tree DB You think of an animal, and this package tries to guess it... when it's wrong, you teach it about your animal. 
anjuta
A GNOME development IDE, for C/C++. Anjuta is a GNOME development IDE and can be used to create either GNOME/Gtk+ applications with glade or glade-gnome or can be used for creating generic applications. It is designed for use with C/C++ and therefore features an easy to use debugger and compilation environment. 
ANMA
Apple Network Managers Association (org., Apple) 
ANMP
Advanced ??? Network Management Protocol 
ANN
Artificial Neural Networks (NN) 
anonymous FTP
A means of transferring and obtaining files that are available for public download from FTP sites. The publicly available files are usually kept in a directory called /pub/. See File Transfer Protocol (FTP). 
anonymous FTP
A method of file transfer that allows you to log in to an FTP server as a guest. 
anonymous FTP
Access to FTP servers with an account name of "anonymous" or "ftp" (or sometimes "guest"). When you access FTP URLs with your web browser, it will automatically use anonymous FTP. This means that conceptually, anonymous FTP provides access similar to standard HTTP. However, there is a slight difference. Anonymous FTP servers are frequently misconfigured to allow for anonymous write access to the same directories as read access. Hackers regularly scan the Internet looking for anonymous FTP servers that they can use as drop-off spots for porn and warez. 
ANR
Access Node Router 
ANS
Advanced Network & Services Inc. (IBM, MCI. Merit, NFSnet) 
ANS
American National Standard (ANSI, ISO, USA) 
ANSA
Advanced Networked Systems Architecture (ISA) 
ANSI
American National Standard Institute (org., USA) 
ANSI (American National Standards Institute)
A standards body made up of industry representatives. For infosec purposes, the two interesting areas are the X9 standards for financial/banking, and the X12 standards for EDI (also governing health-care transactions). Contrast: ANSI is the American representative to the ISO. ANSI is made up of industry, whereas NIST specifies standards only for use within government. 
ANSI /an'see/
1. n. [techspeak] The American National Standards Institute. ANSI, along with the International Organization for Standards (ISO), standardized the C programming language (see K&R, Classic C), and promulgates many other important software standards. 2. n. [techspeak] A terminal may be said to be `ANSI' if it meets the ANSI X3.64 standard for terminal control. Unfortunately, this standard was both over-complicated and too permissive. It has been retired and replaced by the ECMA-48 standard, which shares both flaws. 3. n. [BBS jargon] The set of screen-painting codes that most MS-DOS and Amiga computers accept. This comes from the ANSI.SYS device driver that must be loaded on an MS-DOS computer to view such codes. Unfortunately, neither DOS ANSI nor the BBS ANSIs derived from it exactly match the ANSI X3.64 terminal standard. For example, the ESC-[1m code turns on the bold highlight on large machines, but in IBM PC/MS-DOS ANSI, it turns on `intense' (bright) colors. Also, in BBS-land, the term `ANSI' is often used to imply that a particular computer uses or can emulate the IBM high-half character set from MS-DOS. Particular use depends on context. Occasionally, the vanilla ASCII character set is used with the color codes, but on BBSs, ANSI and `IBM characters' tend to go together. 
ANSI C
a revision of C, adding function prototypes, structure passing, structure assignment and standardised library functions. 
ANSI standard
/an'see stan'd*rd/ The ANSI standard usage of `ANSI standard' refers to any practice which is typical or broadly done. It can also be applied in a jovial context in which everyone does something in the same way but it is not quite regulation. For example: ANSI standard shaking of a laser printer cartridge to get extra life from it, or the ANSI standard word tripling in names of usenet alt groups. 
ANSPAG
Advanced Network System Performance and Application Group (RDN-CRC) 
ant
Java based build tool like make A system independent (i.e. not shell based) build tool that uses XML files as "Makefiles". For more information see http://jakarta.apache.org/ant/index.html. 
ANTC
Advanced Networking Test Center (org., USA, AMD, FDDI) 
Anti-Aliasing
a method used to better define higher resolution objects in lower resolution. It is a term often used for fonts. 
antiword
Converts MS Word files to text and ps Antiword is a free MS Word reader. It converts the binary files from MS Word 6, 7, 97 and 2000 to text and Postscript. 
ANTS
AT&T Novell Telephone Services (AT&T, Novell), "A/NTS" 
ANUML
Australian National University Meta Language, "ANU ML" 
AO
Arvutikasutaja Oskustunnistus (Org, Estonia) 
ao40tlmview
Decoder and Viewer for AO-40 Telemetry AO40tlmview decodes the binary telemetry transmitted by the AMSAT OSCAR 40 satellite. It provides an ncurses-based (i.e., text-mode) interface for browsing through the telemetry blocks. The telemetry blocks can either be read from a file (e.g., downloaded from the AMSAT telemetry archive), or received live through a TCP or UDP connection to a demodulator. Furthermore, it can produce simple graphs of the telemetry, either through gnuplot if running in a graphical (X11) environment, or as a crude ASCII graph when running in a text-only environment. 
AOA
American Optometric Association (org., USA) 
AOAC
Always On, Always Connected (NBS) 
AOCD
Advice Of Charge, During the call 
AOCE
Advice Of Charge, at the End of the call 
AOCE
Apple Open Collaboration Environment (Apple) 
AODI
Always On / Dynamic ISDN (ISDN, ACTEF), "AO/DI" 
AOE
Application Operating Environment (AT&T) 
AOI
Active Output Interface (UNI, PMD, FDDI) 
AOL
America OnLine (network, AOL) 
aolserver
AOL Web Server This is the web engine that powers the mighty America On-Line. It is capable of serving a tremendous number of users, and can publish hundreds of virtual servers within the same process at the same time. It is similar in many respects to Zope, except based largely on Tcl. It is multi-threaded, and has a C API that can be used to extend its functionality. 
AOS
Advanced Operating System (OS) 
AOS
Algebraic Operating System (IBM) 
AOTC
Australian Overseas Telecommunications Corporation (org., Australia) 
AOU
Arithmetic Output Unit 
AOW
Asia and Oceania Workshop (OSI) 
AP
Access Point (WLAN) 
AP
Access Provider (ETSI, ETSI 201 671) 
AP
Application Processor 
AP
Auto Precharge (SDRAM) 
AP
Automatic Pagination 
APA
Adaptive Packet Assembly 
APA
All Points Addressable 
APA
Arithmetic Processing Accelerator 
Apache
Apache is the leading internet web server, with over 60% market share, according to the Netcraft survey. Several key factors have contributed to Apache's success: The Apache license. It is an open source, BSD-like license that allows for both commercial and non-commercial uses of Apache. Talented community of developers with a variety of backgrounds and an open development process based on technical merits. Modular architecture. Apache users can easily add functionality or tailor Apache to their specific enviroment. Portable: Apache runs on nearly all flavors of Unix (and Linux), Windows, BeOs, mainframes... Robustness and security. Many commercial vendors have adopted Apache-based solutions for their products, including Oracle, Red Hat and IBM. In addition, Covalent provides add-on modules and 24x7 support for Apache. The following websites use Apache or derivatives. Chances are that if Apache is good enough for them, it is also good enough for you. Amazon.com Yahoo! W3 Consortium Financial Times Network solutions MP3.com Stanford From the Apache website: The Apache Project is a collaborative software development effort aimed at creating a robust, commercial-grade, featureful, and freely-available source code implementation of an HTTP (Web) server. The Apache project has grown beyond building just a web server into other critical server side technologies like Java or XML. The Apache Software Foundation, described in the next section, serves as an umbrella for these projects. From Apache Overview HOWTO
apache
Versatile, high-performance HTTP server The most popular server in the world, Apache features a modular design and supports dynamic selection of extension modules at runtime. Some of its strong points are its range of possible customization, dynamic adjustment of the number of server processes, and a whole range of available modules including many authentication mechanisms, server-parsed HTML, server-side includes, access control, CERN httpd metafiles emulation, proxy caching, etc. Apache also supports multiple virtual homing. Separate Debian packages are available for PHP3, mod_perl, Java Servlet support, Apache-SSL, and other common extensions. More information is available at http://www.apache.org/. 
APAR
Authorized Program Analysis Report (IBM) 
APC
American Power Conversion (manufacturer, UPS) 
APC
ArbeitsPlatz Computer (SNI) 
APC
Association for Progressive Communications (org., network) 
apcalc
Arbitrary precision calculator (original name: calc) Calc is an arbitrary precision arithmetic system that uses a C-like language. Calc is useful as a calculator, an algorithm prototyper and as a mathematical research tool. More importantly, calc provides one with a machine independent means of computation. Calc comes with a rich set of builtin mathematical and programmatic functions. Calc is built on top of the library libcalc that represents numeric values as fractions reduced to their lowest terms. This library can also be used to add arbitrary precision capabilities to your own programs and is available in the Debian package `apcalc-dev'. The original name of this package is `calc', but it had to be changed to `apcalc' for Debian, because there's already another package called `calc' in Debian. Nevertheless, the binary and manpage installed by this package are still named `calc'. 
apcd
APC Smart UPS daemon This daemon monitors an APC UPS either as master, with the serial cable attached to it, or as a slave, with a network connection to the master. The daemon constantly gathers information from the UPS (battery load, Temperature, workload, etc.) and logs them to a file. It shuts down the system cleanly after a certain period of constant power failure or if the battery load falls below a certain level. 
APCUG
Association of Personal Computer User Groups (org.) 
apcupsd
APC UPS Power Management Controls / monitors the status of an APC UPS under Linux. Allows your computer or server to run for a specified length of time on UPS power, and then executes a controlled shutdown in the case of an extended power failure. 
APD
Additional Product Documentation 
APDA
Apple Programmers and Developers Association (org., Apple) 
APDPR
Advanced PDF Password Recovery (PDF) 
APDU
Application Protocol Data Unit (OSI, PDU, OSI/RM, APDU, ICC) 
APE
APplication Engineering 
APEL
A Portable EMACS Library (EMACS, GNU) 
apel
Portable Emacs Library APEL stands for A Portable Emacs Library poe.el emulation module mainly for basic functions and special forms/macros of latest emacsen poem.el provide basic functions to write portable MULE programs mcharset.el provide MIME charset related features broken.el provide information of broken facilities of Emacs. pccl.el utility to write portable CCL program and some utilities. 
APEX
Advanced Packet EXchange 
APF
Advanced Printer Function (IBM, ADT) 
apg
Automated Password Generator - Standalone version APG (Automated Password Generator) is the tool set for random password generation. It generates some random words of required type and prints them to standard output. This binary package contains only the standalone version of apg. This is the first version that can be compiled without SHA, which _should_ make it ok for main. This upload went to non-US nevertheless because I want to have a second opinion. Advantages: * Built-in ANSI X9.17 RNG (Random Number Generator)(CAST/SHA1) * Built-in password quality checking system (now it has support for Bloom filter for faster access --[ BETA ]--) * Two Password Generation Algorithms: 1. Pronounceable Password Generation Algorithm (according to NIST FIPS 181) 2. Random Character Password Generation Algorithm with 35 configurable modes of operation * Configurable password length parameters * Configurable amount of generated passwords * Ability to initialize RNG with user string * Support for /dev/random * Ability to crypt() generated passwords and print them as additional output. * Special parameters to use APG in script * Ability to log password generation requests for network version * Ability to control APG service access using tcpd * Ability to use password generation service from any type of box (Mac, WinXX, etc.) that connected to network * Ability to enforce remote users to use only allowed type of password generation The client/server version of apg has been deliberately omitted. 
API
Application Program Interface (API) 
API
Associacao Portuguesa de Informatica (org., Portugal) 
APIC
Advanced Programmable Interrupt Controller (Intel, PIC) 
APIS
Arbeitsdatei PIOS Innere Sicherheit (INPOL, PIOS) 
APL
A Perspicuous Language / Alles Parallel Loesbar (APL, slang) 
APL
A Programming Language (IBM) 
APLSF
A Programming Language with Shared Files (CMU, DEC) 
APLSF
A Programming Language with Shared Variables (IBM) 
APLV
Arbeitsdatei PIOS LandesVerrat (INPOL, PIOS) 
APM
Advanced Power Management 
APM (Advanced Power Management)
An industry standard for allowing the system processor and various components to enter power-saving modes, including suspend, sleep and off. APM software is especially important for mobile devices, because it saves battery power. 
apmd
APMD is a set of programs for controlling the Advanced Power Management daemon and utilities found in most modern laptop computers. APMD can watch your notebook's battery and warnusers when the battery is low. APMD is also capable of shutting down the PCMCIA sockets before a suspend. Install the apmd package if you need to control the APM system on your laptop. 
apmd
Utilities for Advanced Power Management (APM) On laptop computers, the Advanced Power Management (APM) support provides access to battery status information and may help you to conserve battery power, depending on your laptop and the APM implementation. The apmd program also lets you run arbitrary programs when APM events happen (for example, you can eject PCMCIA devices when you suspend, or change hard drive timeouts when you connect the battery). This package contains apmd(8), a daemon for logging and acting on APM events; and apm(1), a client that prints the information in /proc/apm in a readable format. apmd is notified of APM events by the APM driver in the kernel. Recent Debian kernels are built with APM support but it is disabled by default. You need to boot the kernel with the "apm=on" option if you want to enable the driver. (You may need to add this option to your lilo command line.) 
APMS
Automated Program Management information System 
APNIC
Asian Pacific Network Information Center (org., Internet) 
APO
Advanced Planner and Optimizer (SAP, SCM) 
APOK
Arbeitsdatei PIOS Organisierte Kriminalitaet (INPOL, PIOS) 
APOP
Autenticated Post Office Protocol (Internet, POP, RFC 1734) 
app
/ap/ n. Short for `application program', as opposed to a systems program. Apps are what systems vendors are forever chasing developers to create for their environments so they can sell more boxes. Hackers tend not to think of the things they themselves run as apps; thus, in hacker parlance the term excludes compilers, program editors, games, and messaging systems, though a user would consider all those to be apps. (Broadly, an app is often a self-contained environment for performing some well-defined task such as `word processing'; hackers tend to prefer more general-purpose tools.) See killer app; oppose tool, operating system. 
APP
Application Portability Profile 
APPC
Advanced Peer-to-Peer Communications (IBM, SNA, LU 6.2) 
APPC
Advanced Program to Program Communication (IBM) 
APPC
Application Program to Program Converter (IBM) 
APPCM
Access Protection and Priority Control Mechanism (DQDB) 
APPCP
Advanced Program to Program Communications Protocol (APPC, IBM) 
APPEL
A P3P Preference Exchange Language (P3P) 
append
To place after, or at the end of, a character, a line, or a file. In the vi editor, certain commands let you append text in a document. In the Bourne and C shells, the symbol >> allows you to append output to an existing file (or create a new file if the file does not yet exist). 
append mode
In vi, the mode that allows you to type new text after existing text in a file; terminate this mode by pressing ESC. 
Append Symbol
The > keyboard character, repeated (i.e., >>). It is often used to send the output from a command to a text file, appending the data to the end of the file, rather than replacing the existing content. For example, ls -a >> output.txt sends the current directory list to a file called output.txt, and adds it to the end of the file. Repeating the command will continue to add new data to the end of the file. (Also, see Piping Symbol and Redirection Symbol.) 
APPI
Advanced Peer to Peer Internetworking (Cisco) 
apple2
Apple ][ Emulator This is a fully-functional 100% Apple ][ emulator for the Linux console. It is partly written in 386 (AT&T) assembler and partly in C. You can switch diskettes using a diskette database through an intuitive interface. Furthermore, it is possible to trim the speed of the emulator and it runs in full speed (approximately) twice as fast as an standard Apple II+ on a 486DX-50. It uses the svgalib's key scancodes and implements the undocumented 6502 instructions (required by at least two games: Bug Attack and MS Pacman). Because the Apple ROMs are copyrighted, they are not included here. You will have to make copies of them from your old Apple computer. If you don't want to mess around with this, you can find a copy at: http://geta.life.uiuc.edu/~badger/files/apple_II.rom http://geta.life.uiuc.edu/~badger/files/slot6.rom Transferring your old Apple disks is a bit of work, but you can save yourself the trouble of digging up your old masters by seeing if some kind soul has already done the work for you at: ftp://ftp.apple.asimov.net/pub/apple_II/images/ Remember, you can only use these ROMs and images _legally_ if you already own the original. Have fun! (Ahhh.... What memories!) 
applet
A small application, usually a utility or other simple program, that can be executed on a graphical desktop panel. 
Applet
A small Java program that can be embedded in an HTML page. Applets differ from full-fledged Java applications in that they are not allowed to access certain resources on the local computer, such as files and serial devices (modems, printers, etc.), and are prohibited from communicating with most other computers across a network. The common rule is that an applet can only make an Internet connection to the computer from which the applet was sent. 
Application Program Interface (API)
System software that provides a complete set of functions and resources on which programmers can draw to create interface features, such as pull down menus, command names, dialog boxes, keyboard commands, and windows. In network systems, an API establishes how programes use various network features. 
APPN
Advanced Peer to Peer Networking (IBM) 
appres
list X application resource database 
appunti-informatica-libera
Italian documentation about free software This package contains the HTML version of "Appunti di Informatica Libera" written by Daniele Giacomini <daniele@swlibero.org>. The entire book is in Italian and there are no translations into other languages. The book can be downloaded in other formats from ftp://a2.swlibero.org/a2/. Questo pacchetto contiene la version HTML di "Appunti di Informatica Libera" di Daniele Giacomini <daniele@swlibero.org>. L'intera opera h in Italiano e non esistono traduzioni in altre lingue. L'opera pur essere scaricata in altri formati da ftp://a2.swlibero.org/a2/. 
APR
Arbeitsdatei PIOS Rauschgift (INPOL, PIOS) 
apropos
search the manual page names and descriptions 
aprsd
Internet Gateway for the Automatic Position Reporting System aprsd is an internet to RF gateway (igate) for the APRS Automatic Position Reporting System. It allows hams on the Internet to send text messages to hams on RF, especially when linked to the worldwide APRServe network (www.aprs.net). 
aprsdigi
Digipeater for APRS aprsdigi is a repeater for the Automatic Position Reporting System, APRS. It also includes aprsmon, a one-way gateway to APRS on TCP/IP. 
APS
Active Pixel Sensor 
APS
Application Page Server 
APS
Application Service Provider (WAN) 
APS
Asynchronous Protocol Specification 
APSE
Ada Programming Support Environment 
APSE
Agfa Publishing Systems Environment (Agfa, DTP) 
apsfilter
Magic print filter with automatic file type recognition apsfilter makes printing many file formats much easier. It features on-the-fly decompression and conversion, and works on both PostScript and non-PostScript (via Ghostscript) graphical printers. Among the supported formats are: gzip, bzip2, compress, freeze, pack, ASCII, BMP, data (PCL, etc.), DVI, FBM, FIG, FITS, GIF, Group 3 fax, HTML, IFF ILBM, JPEG, Kodak Photo CD, MGR, MIFF, PBM/PGM/PNM/PPM, PDF, PNG, PostScript, RLE, SGI, Sketch, Sun raster, Targa, TIFF, troff, WPG, X pixmap, XCF. Note that actual support depends on the installed filter programs. 
APSL
Apple Public Source License (Apple) 
APT
Address Pass Through 
apt
Advanced front-end for dpkg This is Debian's next generation front-end for the dpkg package manager. It provides the apt-get utility and APT dselect method that provides a simpler, safer way to install and upgrade packages. APT features complete installation ordering, multiple source capability and several other unique features, see the Users Guide in /usr/share/doc/apt/guide.text.gz 
APT
Advanced Photoscale Technology (Brother) 
APT
Automatically Programmed Tools 
apt-cache
APT package handling utility - cache manipulator 
apt-cdrom
APT CDROM managment utility 
apt-config
APT Configuration Query program 
apt-dpkg-ref
APT, Dpkg Quick Reference sheet A quick lookup chart with various APT and dpkg options for handy reference, for those who haven't quite memorized the most commonly used commands. 
apt-extracttemplates
Utility to extract DebConf config and templates from Debian packages 
apt-file
APT package searching utility -- command-line interface apt-file is a command line tool for searching packages for the APT packaging system. Unlike apt-cache, you can search in which package a file is included or list the contents of a package without installing or fetching it. 
apt-ftparchive
Utility to generate index files 
apt-get
APT package handling utility - command-line interface 
apt-listchanges
Display new Debian changelog entries from .deb archives apt-listchanges is a tool to show what has been changed in a new version of a Debian package, as compared to the version currently installed on the system. It does this by extracting the relevant entries from the Debian changelog file, usually found in /usr/share/doc/package/changelog.Debian.gz It can be run on several .deb archives at a time to get a list of all of the changes that would be effected by installing or upgrading a group of packages. It can be configured to do this automatically during upgrades using apt. 
apt-move
Move cache of Debian packages into a mirror hierarchy apt-move is used to move a collection of Debian package files into a proper archive hierarchy of the form debian/dists/... It is intended as a tool to help manage the apt-get(8) file cache, but could be configured to work with any collection of Debian packages. Running apt-move periodically will assist in managing the resulting partial mirror by optionally removing obsolete packages, and creating valid local Packages.gz files. It can also optionally employ rsync(1) to build a partial or complete local mirror of a Debian binary distribution (including an ``installed-packages only'' mirror). 
apt-proxy
Debian archive proxy and partial mirror builder apt-proxy automatically builds a Debian HTTP mirror based on requests which pass through the proxy. It's great for multiple Debian machines on the same network with a slower internet link. The archive is automatically kept up to date using http, ftp or rsync. Cache cleaning of unused and old versions is configurable. You can also import the contents of your apt cache into the archive using apt-proxy-import. For more information, see the apt-proxy homepage at http://apt-proxy.sourceforge.net The suggested packages are needed for the following features: wget for http/ftp backend support, rsync for rsyncd backends, dpkg-dev for apt-proxy-import and stat for improved apt-proxy performance. 
apt-setup
add apt download sources 
apt-show-source
Shows source-package information This program parses the APT lists for source packages and the dpkg status file and then lists every package with a different version number than the one installed. It's very useful if your deb-src sources.list entries point to unstable and your deb entries point to stable. 
apt-show-versions
Lists available package versions with distribution apt-show-versions parses the dpkg status file and the APT lists for the installed and available package versions and distribution and shows upgrade options within the specific distribution of the selected package. This is really useful if you have a mixed stable/testing environment and want to list all packages which are from testing and can be upgraded in testing. 
apt-sortpkgs
Utility to sort package index files 
apt-spy
writes a sources.list file based on bandwidth tests. Downloads from debian.org a list of current mirrors and tests each of the mirrors for bandwidth. Writes a /etc/apt/sources.list file based on the responses it gets. 
apt-utils
APT utility programs This package contains some infrequently used APT utility programs such as apt-ftparchive, apt-sortpkgs and apt-extracttemplates. apt-extracttemplates is used by debconf to prompt for configuration questions before installation. apt-ftparchive is used to create Package and other index files. apt-sortpkgs is a Package/Source file normalizer. 
apt-zip
Update a non-networked computer using apt and removable media These scripts simplify the process of using dselect and apt on a non-networked Debian box, using removable media like ZIP floppies. One generates a `fetch' script (supporting backends such as wget and lftp, in a modular, extensible way) to be run on a host with better connectivity, check space constraints of your removable media, and then install the package on your Debian box. Note on current version: space-checking is not done and spanning multiple disks is not yet supported. 
APTC
Advanced Processor Temperature Control (Chaintech) 
aptitude
curses-based apt frontend aptitude is a curses-based apt frontend with a number of useful extended features, including: a mutt-like syntax for matching packages in a flexible manner, dselect-like persistence of user actions, the ability to retrieve and display the Debian changelog of most packages, and extreme flexibility and customization. aptitude is also Y2K-compliant, non-fattening, naturally cleansing, and housebroken. 
APTM
Application Program to Transaction Manager (TP) 
APW
Arbeitsdatei PIOS Waffen (INPOL, PIOS) 
AR
Administrative Request [message] (LFAP) 
ar
create, modify, and extract from archives 
ARA
Administrative Request Acknowledge [message] (LFAP) 
ARA
Affiliate Registration Authority (RA, PKI, ITU) 
ARA
Apple[talk] Remote Access (Apple, AppleTalk) 
Arabeyes Project
Arabeyes is a Meta project that is aimed at fully supporting the Arabic language in the Unix/Linux environment. It is designed to be a central location to standardize the Arabization process. Arabeyes relies on voluntary contributions by computer professionals and enthusiasts all over the world. 
ARAG
AntiReflection AntiGlare (ViewSonic) 
aranym
Atari Running on Any Machine aranym is a 32bit Atari ST/TT/Falcon software layer (read as virtual machine) for Atari applications. NOTE: For proper use you will need image of Atari Falcon ROM or you can use open source ROM image from EmuTOS project at http://emutos.sf.net 
ARAP
Apple Remote Access Protocol (Apple, AppleTalk) 
ARB
Architecture Review Board (OpenGL, manufacturer, org.) 
arbortext-catalog
Catalog support classes and parsing tools These Java classes implement the OASIS Entity Management Catalog format for resolving XML public identifiers into accessible files or resources on a user's system or throughout the Web. These definitions can easily be incorporated into most Java-based XML processors, thereby giving the users of these processors all the benefits of public identifier use. Two sample applications for parsing catalogs and resolving entities are included. Related tools that provide catalog support for the Saxon and XT xslt processors are available in the saxon-catalog and xt-catalog packages. Author: Norman Walsh <ndw@nwalsh.com> Homepage: http://www.arbortext.com/customer_support/updates_and_technical_notes/catalogs/docs/README.htm 
ARC
Advanced RISC Computing [architecture] (ACE, RISC) 
ARCA
Advanced RISC Computing Architecture (ACE, RISC) 
Arcangeli, Andrea
employed by SuSE as a kernel developer, Andrea has created the IKD kernel debugging tool and the workaround for a famous TCP incompatibility between Solaris and Linux. 
arch
print machine architecture 
arch
revision control system arch is a revision control system with features that are ideal for projects characterized by widely distributed development, concurrent support of multiple releases, and substantial amounts of development on branches. It is intended to replace CVS and corrects many mis-features of that system. Highlights: - distributed databases - fancy merging - renames handling - web interface 
Arch Linux
Arch Linux is an i686-optimized Linux distribution. It is lightweight and contains the latest stable versions of software. Packages are in .tar.gz format and are tracked by a package manager that is designed to allow easy package upgrades. Arch is designed to be streamlined while allowing for a customized configuration, with newer features such as reiserfs/ext3 and devfs. The inital version, 0.1, was released March 11, 2002. Arch 0.4 (Dragon) was released December 18, 2002. Arch Linux released Pacman 2.1 (package manager) on August 22, 2002. 
Archie
A tool (software) for finding files stored on anonymous FTP sites. You need to know the exact file name or a substring of it. By 1999 Archie had been almost completely replaced by web-based search engines. Back when FTP was the main way people moved files over the Internet archie was quite popular. 
architecture
The design, 0, and integration of components within a computer system, primarily determined by the central processing unit that the system employs. 
Archive
A single large file containing multiple files, usually compressed to save storage space. Often created to facilitate transferring between computers. Popular archival formats include ARJ, TAR, ZIP and ZOO. Also, to create such an archive file. 
archive
To collect files into one large file for storage or backup purposes. Archives are often used for the purpose of saving disk space. 
archivemail
archive and compress your old email Archivemail moves old mail out of a mailbox (in Maildir, MH, or mbox-format) and archives it in a compressed mbox-format mailbox file. It is well suited to be run from cron for automatic archiving of your old mail. 
ARCNET
Attached Resource Computer NETwork (Datapoint), "ARCnet" 
ARE
All Routes Explorer (ATM) 
arena
n. [common; Unix] The area of memory attached to a process by brk(2) and sbrk(2) and used by malloc(3) as dynamic storage. So named from a malloc: corrupt arena message emitted when some early versions detected an impossible value in the free block list. See overrun screw, aliasing bug, memory leak, memory smash, smash the stack. 
AREXX
Amiga Restructured EXtended eXecutor [language] (Amiga, Commodore, REXX) 
arg
/arg/ n. Abbreviation for `argument' (to a function), used so often as to have become a new word (like `piano' from `pianoforte'). "The sine function takes 1 arg, but the arc-tangent function can take either 1 or 2 args." Compare param, parm, var. 
argante
A new virtual operating system A new Polish (complete!) virtual operating system - written to be secure and stable - and, by the way, very efficient. Argante supports Hierarchical Access Control (HAC) and OSI architecture and also DISTRIBUTED NETWORKING. So every software written for Argante can be divided into some parts, each of them running on diferrent computer (the software is platform independent, so one of modules can run on Linux, the other one - on FreeBSD, NetBSD, OpenBSD, SunOS/Solaris or IRIX). Compiled without SSL support because of restrictions in some countries - but you can use ssh tunnelling to get secure rIPC connections. 
argument
a mathematical term that refers to a number, character or word which changes the action of the command it is applied to. 
Argument
Words, phrases or numbers that you enter on the same command line as a command or a statement to expand or modify how that command or statement operates. 
argus-client
IP network transaction auditing tool argus is a network transaction auditing tool that allows the user to easily classify connections using tcpdump(1) compliant expressions. Argus runs as an application level daemon, promiscuously reading network datagrams from a specified interface, and generates network traffic audit records for the network activity that it encounters. Auditing records can be used to ensure that access control policies are being enforced, identify network problems such as denial of service attacks and more. This package contains the client programs for the argus server. Please see the package argus-server for the appropriate server. 
argus-server
IP network transaction auditing tool argus is a network transaction auditing tool that allows the user to easily classify connections using tcpdump(1) compliant expressions. Argus runs as an application level daemon, promiscuously reading network datagrams from a specified interface, and generates network traffic audit records for the network activity that it encounters. Auditing records can be used to ensure that access control policies are being enforced, identify network problems such as denial of service attacks and more. This package contains the binaries required for the argus server. Please see the package argus-client for appropriate clients. 
ari-yahoo
Text based simple Yahoo Messenger client Simple Yahoo messenger client that requires no windowing system. 
aria
a download tool similar to Reget or GetRight Aria is a download tool similar to Reget or GetRight. It downloads files from Internet via HTTP or FTP. The transfer can be paused, resumed, queued and saved. It has very friendly GTK based GUI, and useful log consoles. Program supports CRC checking, HTTP proxy server, cut-and-paste, drag-and-drop, and can define specific file retrieving procedure for particular web servers. 
aribas
interpreter for arithmetic ARIBAS is an interactive interpreter suitable for big integer arithmetic and multiprecision floating point arithmetic. It has a syntax similar to Pascal or Modula-2, but contains also features from other programming languages like C, Lisp, Oberon. The Aribas home page is http://www.mathematik.uni-muenchen.de/~forster/sw/aribas.html 
ARIN
American Registry for Internet Numbers (org., Internet, USA) 
aris-extractor
Scan system logs for security incidents and report them to ARIS The Attack Registry and Intelligence Service (ARIS) is a free, user-integrated attack-trending system hosted by SecurityFocus that allows administrators and operators of Intrusion Detection Systems (IDSs) to track, evaluate and respond to security alerts and attacks in a proactive manner. As an integral piece of the ARIS Analzyer service, SecurityFocus's open-source ARIS Extractor utility distills data provided by IDS attack-list logs to build client portfolios that provide meaningful, graphical analysis of potentially malicious network incidents. By filtering out insignificant or benign data and converting it to a common format (xml), ARIS Extractor streamlines incident reporting for both security professionals and home users in a way that allows IDS operators to focus only on relevant attacks and incidents. Additionally, ARIS Extractor ensures client confidentiality through secure file-transfer protocols and optional IP address suppression. 
ARJ
A popular file compression/archival tool, available for UNIX/Linux, DOS/Windows, and other operating systems. Files compressed in this manner typically have .arj or .ar extensions. 
ark
An archiver for KDE An archiver for KDE Supports: zip, tar, tar + compression (lzop, gzip, bzip2, bzip, compress) lha, zoo, rar, ar, etc... 
ark
Ark is a KDE tool for handling archive files. It supports the following file formats: zip, plain tar and tar with compression, gzip, bzip2, bzip, compress, lha, zoo, single files compressed with compressors, lzop, gzip, bzip2, bzip, compress rar and ar 
ark
KDE archive tool. 
Ark Linux
Ark Linux is a Linux distribution designed especially for desktop use, primarily for people without prior Linux experience. Its main goal is ease of use, and the inclusion of many tools end users will need. Ark Linux is based on Red Hat 7.3 / 8.0, with KDE. Initial Freshmeat version 1.0-0.alpha7.1 was released March 14, 2003. 
ARKD
Abuse Resistant Key Distribution (Arcade) 
ARL
Access Rights List (Banyan, VINES) 
arla
A free client for the AFS distributed network filesystem This is a free, mostly independently written, implementation of the client side of the Andrew File System. AFS is a distributed network file system. AFS presents a unified directory hierarchy /afs containing all volumes from any site. The default configuration includes many sites including KTH, MIT, CMU and others. For authentication AFS uses Kerberos. 
arla-modules-source
Source to generate arla-modules This package provides the source code xfs kernel module which is actually a generic user-space filesystem interface. Arlad communicates with it over a character device and handles all file system requests. Xfs caches some lookups but doesn't implement any of the AFS protocol. 
ARLL
Advanced Run-Length Limited [encoding] 
ARM
Advanced RISC Machines (manufacturer, Acorn, Apple, VLSI, RISC) 
ARM
Annotated [c++] Reference Manual 
ARM
Asynchronous Response Mode 
ARM Linux
ARM Linux is a port of the Linux Operating System to ARM processor based machines mainly by Russell King with contributions from others. 
ARMA
Association of Records Managers and Administrators, inc. (org.) 
armagetron
A 3D Tron-like high speed game. A 3D Tron-like high speed game. The rules are simple: you ride a light cycle (a kind of motorbike that can only turn 90 degrees at a time, leaves a wall behind and cannot be stopped) and have to avoid running into walls while at the same time you have to try to get your opponent to run into them. The idea is based on the Disney movie from 1982 called "Tron". If you ever wanted to take a try at one of those speed demons features in the movie, this is your chance. Of all the Tron clones out there, I think one is the one that comes closest to the feeling the movie tries to express. This is in part thanks to the sophisticated camera motions, in part to the superb modelling work and in part to the fabulous sound effects. To add some extra fascination into the game, unlike to other Tron clones, in armagetron you can accelerate. Alas, there's no accelerate button. If you want to drive fast, you have to drive good -- and really really close to the walls. Armagetron can be played against AI opponents, against other humans over the network, or a mixture of both. Still not convinced? http://pluto.spaceports.com/~zman/armagetron/ 
ARMM
n. [acronym, `Automated Retroactive Minimal Moderation'] A Usenet cancelbot created by Dick Depew of Munroe Falls, Ohio. ARMM was intended to automatically cancel posts from anonymous-posting sites. Unfortunately, the robot's recognizer for anonymous postings triggered on its own automatically-generated control messages! Transformed by this stroke of programming ineptitude into a monster of Frankensteinian proportions, it broke loose on the night of March 31, 1993 and proceeded to spam news.admin.policy with a recursive explosion of over 200 messages. ARMM's bug produced a recursive cascade of messages each of which mechanically added text to the ID and Subject and some other headers of its parent. This produced a flood of messages in which each header took up several screens and each message ID and subject line got longer and longer and longer. Reactions varied from amusement to outrage. The pathological messages crashed at least one mail system, and upset people paying line charges for their Usenet feeds. One poster described the ARMM debacle as "instant Usenet history" (also establishing the term despew), and it has since been widely cited as a cautionary example of the havoc the combination of good intentions and incompetence can wreak on a network. Compare Great Worm; sorcerer's apprentice mode. See also software laser, network meltdown. 
ARMS
Architecture for Reliable Managed Storage (Cheyenne) 
ARMS
Automation Resources Management System 
ARNS
Appletalk Remote Network Server (Apple, AppleTalk) 
ARO
Affiliate Registration Organization (RA, PKI, ITU) 
AROM
Alterable Read Only Memory (ROM) 
ARP
a TCP/IP protocol used to obtain a station's physical address from its logical IP address. ARP requests are broadcast onto the network. 
ARP
Address Resolution Protocol (Internet, RFC 826) 
ARP
ARP is a protocol used with TCP/IP to resolve addresses. The TCP/IP stack used to transmit data across the Internet is independent from the Ethernet used to shuttle data between local machines. Thus, when machine needs to send an IP packet to a nearby machine, it broadcasts the IP address on the local Ethernet asking for the corresponding Ethernet address. The machine who owns the address responds, at which point the IP packet in question is sent to that Ethernet address. Key point: By sniffing ARP packets off the wire, you can discover a lot of stuff going on. This is especially true of cable-modem and DSL segments. Since ARP packets are broadcasts, you aren't technically breaking your user's agreement by sniffing. Key point: You can spoof ARP requests and/or responses in order to redirect traffic through your machine. 
arp
Linux ARP kernel module. 
arp
manipulate the system ARP cache 
ARP redirect
A tool that is part of the standard hacker's toolkit, ARP redirect will redirect Internet traffic from a local neighbor through your own machine allowing you to sniff it. 
ARPA
Advanced Research Projects Agency (org., USA) 
arpack++
object-oriented version of the ARPACK package. ARPACK++ is an object-oriented version of the ARPACK package. It consists a collection of classes that offers c++ programmers an interface to ARPACK. It preserves the full capability, performance, accuracy and low memory requirements of the FORTRAN package, but takes advantage of the c++ object-oriented programming environment. 
arpack2
Fortran77 subroutines to solve large scale eigenvalue problems. ARPACK software is capable of solving large scale symmetric, nonsymmetric, and generalized eigenproblems from significant application areas. The software is designed to compute a few (k) eigenvalues with user specified features such as those of largest real part or largest magnitude. Storage requirements are on the order of n*k locations. No auxiliary storage is required. A set of Schur basis vectors for the desired k-dimensional eigen-space is computed which is numerically orthogonal to working precision. Numerically accurate eigenvectors are available on request. Important Features: o Reverse Communication Interface. o Single and Double Precision Real Arithmetic Versions for Symmetric, Non-symmetric, o Standard or Generalized Problems. o Single and Double Precision Complex Arithmetic Versions for Standard or Generalized Problems. o Routines for Banded Matrices - Standard or Generalized Problems. o Routines for The Singular Value Decomposition. o Example driver routines that may be used as templates to implement numerous Shift-Invert strategies for all problem types, data types and precision. 
ARPAnet
A wide area network (WAN), created in 1969 with funding from the Advanced Research Projects Agency (ARPA). Undergoing constant research and development in the earls to mid-l970s, ARPAnet served as the testbed for the development of TCP/IP (the protocols that make the Internet possible). A major goal of the ARPAnet project was to increase the military's command and control capability enabling communication across a variety of physically dissimilar media, including satellites. An allied goal was to create a robust network capable of withstanding outages, such as those that might result from a nuclear exchange. ARPAnet met these objectives, but it also surprised its creators: It was found in short order that most ARPAnet users preferred to use the network for communication, such as electronic mail and discussion groups. Initially, the ARPAnet was available only to government research institutes and to universities holding Department of Defense (DoD) research contracts. In 1983, ARPAnet was divided into a high-security military network (Milnet) and an ARPAanet that was recast as a research and development network. 
ARPANET
Advanced Research Projects Agency NETwork (USA, network) 
arpd
A user-space ARP daemon The ARP daemon moves the management of the ARP (Address Resolution Protocol) table from kernel to user space. It is useful for sites with LARGE network segments (256+ systems per segment), because the kernel hash tables are not optimized to handle this situation. To use the ARP daemon your kernel needs to have ARPD and NETLINK support enabled. The standard kernels of Debian GNU/Linux lack this support. 
ARPDP
Association of Rehabilitation Programs in Data Processing (org., USA) 
arping
sends IP and/or ARP pings (to the MAC address) The arping utility sends ARP and/or ICMP requests to the specified host and displays the replies. The host may be specified by its hostname, its IP address, or its MAC address. This program is only able to run as root. Make it setuid if you like. 
arpwatch
Ethernet/FDDI station activity monitor. Arpwatch maintains a database of Ethernet MAC addresses seen on the network, with their associated IP pairs. Alerts the system administrator via e-mail if any change happens, such as new station/activity, flip-flops, changed and re-used old addresses. 
ARQ
Automatic Re-transmission reQuest (MODEM) 
ARRA
Announced Retransmission Random Access (MAC) 
ARSIG
ARSIG is a GNU Linux distribution designed especially for diskless routers, where the main (primary) boot-up device is compact-flash card. The goal is to make the "static" part of the operating system lay on the CF card, mounted as readonly. All other parts of the OS that need read-write access are mounted in RAM. ARSIG is based on Openwall GNU/*/Linux (Owl). Initial Freshmeat announcement, version 1.0_pre01 (PHDS), was released January 4, 2003. 
ART
Adaptive Resonance Theory (NN) 
ART
Advanced Resolution Technology (Minolta) 
artist
Emacs Lisp drawing package Artist is an Emacs lisp package that allows you to draw lines, rectangles and ellipses by using your mouse and/or keyboard. Note: Artist does not work with XEmacs 
ARTS
Accelerated Ray-Tracing System (raytracing) 
arts
aRts (Analog Real-Time Synthesizer) is a sound system for KDE.aRts creates and processes sound using small modules that do certain tasks. aRts modules can create waveforms (oscillators), playsamples, filter data, add signals, perform effects like delay/flanger/chorus, or output the data to a soundcard. By connecting all of the modules together, you can perform complex tasks like simulating a mixer, generating an instrument, or playing a wave file with effects. 
ARTS
Asynchronous Remote Takeover Server 
artsbuilder
Arts synthesizer designer This is the analog real-time synthesizer graphical design tool. 
ARTT
Asynchronous Remote Takeover Terminal 
AS
Advanced Server (Windows NT) 
AS
Authentication Service (DCE) 
AS
Autonomous System (IP, Internet, RFC 1930) 
as
the portable GNU assembler. 
AS400
Application System/400 (IBM), "AS/400" 
as86
Assembler for 8086..80386 processors 
ASA
Advanced SCSI Architecture (SCSI) 
ASA
American Standards Association (org., USA, ANSI, predecessor) 
ASAP
As Soon As Possible (slang, Usenet, IRC) 
ASAP
Automatic Switching And Processing 
ASBR
Autonomous System Border / Boundary Router (AS) 
ASC
Accredited Standards Committee (org., ANSI) 
ASC
Additional Sense Code 
ASC
American Society for Cybernetics (org., USA) 
ASC
Authorized Support Center 
ASC
Automatic Contrast Selection (FAX) 
ascd
CD player and mixer AScd is a small CD player and mixer that can be "docked" with AfterStep and WindowMaker window managers. 
ascdc
AfterStep CD changer ascdc is a small CD changer. It follows the look and feel of the AfterStep window manager and is ideally suited to be run within AfterStep's Wharf module. 
ASCI
Accelerated Strategic Computing Initiative 
ASCII
/as'kee/ n. [originally an acronym (American Standard Code for Information Interchange) but now merely conventional] The predominant character set encoding of present-day computers. The standard version uses 7 bits for each character, whereas most earlier codes (including early drafts of ASCII prior to June 1961) used fewer. This change allowed the inclusion of lowercase letters -- a major win -- but it did not provide for accented letters or any other letterforms not used in English (such as the German sharp-S or the ae-ligature which is a letter in, for example, Norwegian). It could be worse, though. It could be much worse. See EBCDIC to understand how. A history of ASCII and its ancestors is at http://www.wps.com/texts/codes/index.html. Computers are much pickier and less flexible about spelling than humans; thus, hackers need to be very precise when talking about characters, and have developed a considerable amount of verbal shorthand for them. Every character has one or more names -- some formal, some concise, some silly. Common jargon names for ASCII characters are collected here. See also individual entries for bang, excl, open, ques, semi, shriek, splat, twiddle, and Yu-Shiang Whole Fish. This list derives from revision 2.3 of the Usenet ASCII pronunciation guide. Single characters are listed in ASCII order; character pairs are sorted in by first member. For each character, common names are given in rough order of popularity, followed by names that are reported but rarely seen; official ANSI/CCITT names are surrounded by brokets: <>. Square brackets mark the particularly silly names introduced by INTERCAL. The abbreviations "l/r" and "o/c" stand for left/right and "open/close" respectively. Ordinary parentheticals provide some usage information. ! Common: bang; pling; excl; not; shriek; ball-bat; <exclamation mark>. Rare: factorial; exclam; smash; cuss; boing; yell; wow; hey; wham; eureka; [spark-spot]; soldier, control. " Common: double quote; quote. Rare: literal mark; double-glitch; <quotation marks>; <dieresis>; dirk; [rabbit-ears]; double prime. # Common: number sign; pound; pound sign; hash; sharp; crunch; hex; [mesh]. Rare: grid; crosshatch; octothorpe; flash; <square>, pig-pen; tictactoe; scratchmark; thud; thump; splat. $ Common: dollar; <dollar sign>. Rare: currency symbol; buck; cash; string (from BASIC); escape (when used as the echo of ASCII ESC); ding; cache; [big money]. % Common: percent; <percent sign>; mod; grapes. Rare: [double-oh-seven]. & Common: <ampersand>; amp; amper; and, and sign. Rare: address (from C); reference (from C++); andpersand; bitand; background (from sh(1)); pretzel. [INTERCAL called this `ampersand'; what could be sillier?] ' Common: single quote; quote; <apostrophe>. Rare: prime; glitch; tick; irk; pop; [spark]; <closing single quotation mark>; <acute accent>. ( ) Common: l/r paren; l/r parenthesis; left/right; open/close; paren/thesis; o/c paren; o/c parenthesis; l/r parenthesis; l/r banana. Rare: so/already; lparen/rparen; <opening/closing parenthesis>; o/c round bracket, l/r round bracket, [wax/wane]; parenthisey/unparenthisey; l/r ear. * Common: star; [splat]; <asterisk>. Rare: wildcard; gear; dingle; mult; spider; aster; times; twinkle; glob (see glob); Nathan Hale. + Common: <plus>; add. Rare: cross; [intersection]. , Common: <comma>. Rare: <cedilla>; [tail]. - Common: dash; <hyphen>; <minus>. Rare: [worm]; option; dak; bithorpe. Common: dot; point; <period>; <decimal point>. Rare: radix point; full stop; [spot]. / Common: slash; stroke; <slant>; forward slash. Rare: diagonal; solidus; over; slak; virgule; [slat]. : Common: <colon>. Rare: dots; [two-spot]. ; Common: <semicolon>; semi. Rare: weenie; [hybrid], pit-thwong. < > Common: <less/greater than>; bra/ket; l/r angle; l/r angle bracket; l/r broket. Rare: from/{into, towards}; read from/write to; suck/blow; comes-from/gozinta; in/out; crunch/zap (all from UNIX); tic/tac; [angle/right angle]. = Common: <equals>; gets; takes. Rare: quadrathorpe; [half-mesh]. ? Common: query; <question mark>; ques. Rare: quiz; whatmark; [what]; wildchar; huh; hook; buttonhook; hunchback. @ Common: at sign; at; strudel. Rare: each; vortex; whorl; [whirlpool]; cyclone; snail; ape; cat; rose; cabbage; <commercial at>. V Rare: [book]. [ ] Common: l/r square bracket; l/r bracket; <opening/closing bracket>; bracket/unbracket. Rare: square/unsquare; [U turn/U turn back]. \ Common: backslash, hack, whack; escape (from C/UNIX); reverse slash; slosh; backslant; backwhack. Rare: bash; <reverse slant>; reversed virgule; [backslat]. ^ Common: hat; control; uparrow; caret; <circumflex>. Rare: xor sign, chevron; [shark (or shark-fin)]; to the (`to the power of'); fang; pointer (in Pascal). _ Common: <underline>; underscore; underbar; under. Rare: score; backarrow; skid; [flatworm]. ` Common: backquote; left quote; left single quote; open quote; <grave accent>; grave. Rare: backprime; [backspark]; unapostrophe; birk; blugle; back tick; back glitch; push; <opening single quotation mark>; quasiquote. { } Common: o/c brace; l/r brace; l/r squiggly; l/r squiggly bracket/brace; l/r curly bracket/brace; <opening/closing brace>. Rare: brace/unbrace; curly/uncurly; leftit/rytit; l/r squirrelly; [embrace/bracelet]. A balanced pair of these may be called `curlies'. | Common: bar; or; or-bar; v-bar; pipe; vertical bar. Rare: <vertical line>; gozinta; thru; pipesinta (last three from UNIX); [spike]. ~ Common: <tilde>; squiggle; twiddle; not. Rare: approx; wiggle; swung dash; enyay; [sqiggle (sic)]. The pronunciation of # as `pound' is common in the U.S. but a bad idea; Commonwealth Hackish has its own, rather more apposite use of `pound sign' (confusingly, on British keyboards the pound graphic happens to replace #; thus Britishers sometimes call # on a U.S.-ASCII keyboard `pound', compounding the American error). The U.S. usage derives from an old-fashioned commercial practice of using a # suffix to tag pound weights on bills of lading. The character is usually pronounced `hash' outside the U.S. There are more culture wars over the correct pronunciation of this character than any other, which has led to the ha ha only serious suggestion that it be pronounced `shibboleth' (see Judges 12:6 in an Old Testament or Tanakh). The `uparrow' name for circumflex and `leftarrow' name for underline are historical relics from archaic ASCII (the 1963 version), which had these graphics in those character positions rather than the modern punctuation characters. The `swung dash' or `approximation' sign is not quite the same as tilde in typeset material but the ASCII tilde serves for both (compare angle brackets). Some other common usages cause odd overlaps. The #, $, >, and & characters, for example, are all pronounced "hex" in different communities because various assemblers use them as a prefix tag for hexadecimal constants (in particular, # in many assembler-programming cultures, $ in the 6502 world, > at Texas Instruments, and & on the BBC Micro, Sinclair, and some Z80 machines). See also splat. The inability of ASCII text to correctly represent any of the world's other major languages makes the designers' choice of 7 bits look more and more like a serious misfeature as the use of international networks continues to increase (see software rot). Hardware and software from the U.S. still tends to embody the assumption that ASCII is the universal character set and that characters have 7 bits; this is a major irritant to people who want to use a character set suited to their own languages. Perversely, though, efforts to solve this problem by proliferating `national' character sets produce an evolutionary pressure to use a smaller subset common to all those in use. 
ASCII
American Standard Code of Information Interchange 
ascii
Prints aliases and tables for ASCII character. A programmer's utility that recognizes different ways of naming ASCII characters (hex, octal, binary, decimal, C escape, ISO character table pair, slang names, and others) and prints out all equivalent aliases. 
ASCII
see American Standard Code for Information Interchange (ASCII). 
ASCII (American Standard Code for Information Interchange)
a standard code used for representing information on computer systems and networks. It uses the printing and non-printing characters that can be generated by the keyboard. Since 7 bits are available to represent each character it is possible to represent a total of 128 different characters. 
ASCII (American Standard Code for Information Interchange)
This is the defacto world-wide standard for the code numbers used by computers to represent all the upper and lower-case Latin letters, numbers, punctuation, etc. There are 128 standard ASCII codes each of which can be represented by a 7 digit binary number: 0000000 through 1111111. 
ascii-xfr
upload/download files using the ASCII protocol 
asclassic
X11 window manager, AfterStep Classic (forked from v1.1) AfterStep Classic is a window manager based on AfterStep v1.1 which attempts to retain and improve on AfterStep's well-tested stability and configurability. Note that this window manager makes extensive use of the color palette. If you have only an 8-bit color display, it will run as packaged, but you may want to modify the configuration to use fewer colors. AfterStep is a continuation of the BowMan window manager project, but the name was changed to reflect the desire that it do more than simply emulate and become a valuable window manager in its own right. 
asclock
A clock designed with the NeXTStep look This little application displays the time of the day (digital, either 12 or 24 hour format), and the date. It provides three alternatives: one suitable for low color systems, one with "real" NeXTStep colors, and the third one is somewhat in between. 
ascpu
This is an AfterStep look & feel CPU statistics monitor tool. ascpu is a neat 54x54 applet that displays instantaneous and average system, nice and user CPU time. 
ASCSI
Advanced Small Computer Systems Interface (SCSI) 
ASD
Architecture Summary Design 
asd4
Advanced Sound Daemon asd is a full featured esound-replacement. In the final version it will implement everything esound (http://www.tux.org/~ricdude/EsounD.html) does, plus many features. 
ASDSP
Application-Specific Digital Signal Processor 
ASE
Active Storage Element (GigaB, IP-router) 
ASE
Aladdin Smartcard Environment (Fast, Aladdin) 
ASE
Application Service Element (ATM) 
ASEB
ASian EDIFACT Board (org., EDIFACT), "AS/EB" 
ASEMH
Army Standards Electronic Mail Host (mil., USA) 
ASF
Advanced Streaming Format (MS) 
ash
A shell is a basic system program that interprets keyboard and mousecommands. The ash shell is a clone of Berkeley's Bourne shell(sh). Ash supports all of the standard sh shell commands, but is considerably smaller than sh. The ash shell lacks some Bourne shell features (for example, command-line histories), but uses considerably less memory. You should install ash if you need a lightweight shell with many of the same capabilities as the sh shell. 
ASH
Almquist SHell (BSD, Unix, Shell), "ash" 
ash
NetBSD /bin/sh "ash" is a POSIX compliant shell that is much smaller than "bash". We take advantage of that by making it the shell on the installation root floppy, where space is at a premium. It can be usefully installed as /bin/sh (because it executes scripts somewhat faster than "bash"), or as the default shell either of root or of a second user with a userid of 0 (because it depends on fewer libraries, and is therefore less likely to be affected by an upgrade problem or a disk failure). It is also useful for checking that a script uses only POSIX syntax. "bash" is a better shell for most users, since it has some nice features absent from "ash", and is a required part of the system. 
ASI
Adapter Support Interface (IBM, LAN) 
ASI
Amorphous SIlicon drum (Kyocera), "aSI" 
ASI
Aquarius Systems International (manufacturer) 
ASI
Asynchronous SCSI Interface 
ASI
Automatic System Installation 
ASIC
Application Specific Integrated Circuit (IC, RL) 
ASIM
Arbeitskreis Simulation und Kuenstliche Intelligenz (org., GI) 
ASIO
Audio Stream Input/Output 
ASIS
American Society for Information Science (org.) 
asis-programs
Ada Semantic Interface Specification (ASIS) example programs ASIS (Ada Semantic Interface Specification) lets you develop applications to walk through the sources of your Ada programs and examine the semantic constructs. This package contains four programs (asistant, display_source, gnatelim and gnatstub) which are useful to understand or optimize Ada programs. 
ASK
Akademische Software Kooperation (org., Karlsruhe, Germany) 
ASK
Amplitude Shift Keying 
ASKSAM
Access Stored Knowledge via Symbolic Access Method (DB), "askSam" 
ASL
ACPI Source Language (ACPI, AML) 
ASL
Adaptive Speed Levelling (US Robotics) 
ASLT
Advanced Solid Logic Technology (IC) 
ASM
Advanced Server Management (Acer) 
ASM
Association of Systems Management (org.) 
ASMA
Administratively Scoped IP Multicast (RFC 2365, Multicast) 
asmail
AfterStep mail monitor asmail is a small mail monitor similar to xbiff. It follows the AfterStep window manager's look and feel and is ideally suited to be run within AfterStep's Wharf module. 
asmem
This is an AfterStep look & feel memory utilization monitor. asmem displays memory (user/system, buffer and cache) and swap usage in a small 54x54 X window. 
asmix
The tool displays a volume knob. The volume knob adjusts the master volume of your sound card. Just grab the knob with the left button of your mouse and drag it around. 
asmixer
AfterStep audio mixer asmixer is a small audio mixer. It follows the look and feel of the AfterStep window manager and is ideally suited to be run within AfterStep's Wharf module. 
ASMO
Advanced Storage Magneto Optical [disk] (Hitachi, Maxell, Matsushita, Fujitsu, Olympus, Philips, Sanyo, Sharp, Sony, LG Electronics) 
asmodem
AfterStep modem monitor asmodem is a hack of asmail that checks a modem lock file instead of your mail. You just pass it a lock (like /var/lock/LCK..ttyS1) using the -m parameter and off it goes. For best results, use the -s and have wharf Swallow it. 
asmon
A system resource monitor dockapp for Afterstep and WindowMaker Asmon is a wharfable/dockable application for that displays meters detailing CPU, memory, swap, and X mem usage. Also included the exact numbers for load average, mem, swap, and X. Developed to use very little CPU time itself. 
asmounter
monitoring mount points tool asmounter monitors different mount points and facilitates the mounting/unmounting of these mount points. 
ASMP
ASymetric MultiProcessing [system] 
ASMP
ASymmetrisches MultiProzessor [system] 
ASN1
Abstract Syntax Notation One (OSI, ISO, IS 8824), "ASN.1" 
ASNM
AdvanceStack Network Management (HP) 
asnparser
ASN.1 to C/C++ converter This console application helps to convert your ASN.1 description files to C/C++ applications. For more information on asnparser visit the development homepage http://www.openh323.org/ 
ASP
Abstract Service Primitive (OSI) 
ASP
Active Server Pages (HTTP, MS) 
ASP
Advanced Signal Processing / Processor 
ASP
Appletalk Session Protocol (Apple, AppleTalk) 
ASP
Application Service Provider / Providing (ISP, Internet) 
ASP
Association of Shareware Professionals (org., USA) 
ASP
Authorized Service Provider (Sun) 
asp
Discovers present ip-address of dynamically connected hosts. Asp discovers the present ip address of a host that has a dynamically assigned ip-address. This is useful when you want to connect to dynamic hosts, or to help others find you (in which case you run asp as a server). 
ASPEC
Advanced SPectre Entropy Coding (MPEG, Digital audio) 
aspell
A more intelligent replacement for the ispell spell checker Aspell is an interactive spell checker that is designed to eventually replace ispell. It does a much better job of coming up with possible suggestions than ispell (and in some cases even Microsoft Word 97's spell checker). It also has run time support for other non English languages. aspell can learn from users misspellings. Aspell is designed to be a drop-in replacement for ispell. This package comes with a minimal man page. If you want more detailed documentation you should install the aspell-doc package and read the documentation in /usr/share/doc/aspell-doc/. 
aspell
Aspell is a spelling checker designed to eventually replace Ispell. Aspell's primary advantage (over Ispell) is greater ability tosuggesting correct spellings. Aspell includes both compile-time and run-time support for non-English languages and can spellcheck (La)TeXand HTML files. 
aspell
GNU Aspell is a Free and Open Source spell checker designed to eventually replace Ispell. It can either be used as a library or as an independent spell checker. Its main feature is that it does a much better job of coming up with possible suggestions than just about any other spell checker out there for the Englishlanguage, including Ispell and Microsoft Word. It also has many other technical enhancements over Ispell such as using shared memory for dictionaries and intelligently handling personal dictionaries when more than one Aspell processis open at once. 
ASPEN
Automatic System for Performance Evaluation of the Network 
ASPI
Advanced SCSI Programming Interface (Adaptec, API, SCSI) 
ASPIC
Advanced SCSI Programmable Interrupt Controller (PIC, SCSI) 
ASPIK
Algebraic Specifications and Implementations ??? (ISDV) 
ASPLinux
ASPLinux is a Russian distribution from a multi-national company based in Singapore. The Red Hat based ASPLinux GNU/Linux distribution, includes all components for creation of a high perfomance Internet/Intranet server or powerful multimedia workstation. ASP 7.3 (vostok) was released August 13, 2002. 
ASPP
Application Specific Programmable Product (ASIC, ASSP, FPGA, RL) 
ASPS
Advanced Signal Processing System 
ASQ
Automated Software Quality 
ASQC
American Society of Quality Control (org., USA) 
ASR
Automatic Server Restart (HP) 
ASR
Automatic Speech Recognition 
asr-manpages
alt.sysadmin.recovery manual pages A set of humorous manual pages developed on alt.sysadmin.recovery (don't treat them seriously!). They document a set of really useful tools that for some strange reason are not included in any implementation of Unix. This includes such famous commands as lart, sysadmin, luser, bosskill and others. The authors recommend these man pages should be installed on every system. 
Assembler
A program that transforms assembly language program into machine language so the computer can execute the program. 
assembler
a program which converts assembly language into machine code. 
ASSERT
ADEPT Subsystem for Scanning of Electronic Received Traffic (ADEPT, mil., USA) 
assign
To give a value to a variable in a programming or configuration statement. For example, in the Bourne shell statement TERM=vt100, you assign the value vt100 to the environmental variable TERM, which identifies your terminal type (VT100) to Linux. 
ASSIST
Automated Special Security Information System Terminal (mil., USA) 
ASSP
Application Specific Standard Product (RL) 
ASSPA
ASsociation Suisse pour l'Automatique (org., Switzerland) 
ASSR
Agreed Set of Security Rules (mil., USA) 
AST
Atlantic Standard Time [-0400] (TZ, ADT) 
ASTA
Advanced Software Technology and Agorithms (HPCC) 
Astaro Security Linux
A firewall and VPN product based on the 2.4 Linux kernel. Available for free download but not completely open source. There are several branches. Version 3.200 (beta) was released June 4, 2002. A stable 3.217 (for i386) was released April 8, 2003. Beta version 3.391 was released January 30, 2003. The stable 2.x tree is at version 2.031, released November 15, 2002. There is also a version 2.027 for Sun Cobalt was released July 3, 2002. Stable version 4.008 was released June 12, 2003. A 'secured' distribution. 
asterisk
Open Source Private Branch Exchange (PBX) Asterisk is an Open Source Private Branch Exchange (PBX) and telephony development platform that can both replace a conventional PBX and act as a platform for developing custom telephony applications for delivering dynamic content over a telephone similarly to how one can deliver dynamic content through a web browser using CGI and a web server. Asterisk talks to a variety of telephony hardware including BRI, PRI, POTS, and IP telephony clients using the Inter-Asterisk eXchange protocol (e.g. gnophone or miniphone). For more information and a current list of supported hardware, see http://www.asteriskpbx.com. 
ASTRAL
Alliance fuer Strategic Token Ring Advancement and Leadership (manufacturer) 
astyle
Source code indenter for C++/C/Java source code Artistic Style is a reindenter and reformatter of C++, C and Java source code. 
ASU
Asynchron-Synchron Umsetzer 
ASVD
Analog Simultaneous Voice and Data (MODEM) 
Asynchronous
A lack of synchronization. A method of transmitting data over a network using a start bit at the beginning of a character and a stop bit at the end. The time intervak between characters may be varying lengths. In video, a signal is asynchronous when its timing differs from that of the system reference signal. From Glossary of Distance Education and Internet Terminology
asynchronous
It describes a communications strategy where start and stop bits are used to indicate the beginning and end of a character. 
Asynchronous Transfer Mode ( ATM)
A fixed-route network protocol in which transmission packets have direct paths and destinations. ATM is an alternative to TCP/IP, which tags each packet with destination information in the header and can be routed through arbitrary paths on a carrier network such as the Internet. 
AT
Advanced Technology (IBM, PC) 
at
At and batch read commands from standard input or from a specified file.At allows you to specify that a command will be run at a particular time(now or a specified time in the future). Batch will execute commands when the system load levels drop to a particular level. Both commands use /bin/sh to run the commands. You should install the at package if you need a utility that will dotime-oriented job control. Note: you should use crontab instead, if it is a recurring job that will need to be repeated at the same time everyday/week/etc. 
at
Delayed job execution and batch processing At and batch read shell commands from standard input storing them as a job to be scheduled for execution in the future. Use at to run the job at a specified time batch to run the job when system load levels permit 
at
queue, examine or delete jobs for later execution 
At
Run a command once at some future time. 
AT command set (Hayes command set)
Today's modems are controlled by the old Hayes "AT" command set. In order to dial the phone number 555-1212 using a modem, you simply send the string "ATDT555-1212" to the modem. The "D" following the "AT" means to "Dial", and the "T" means to use "Tone" dialing (rather than "P" for "Pulse" dialing). The command "ATH0" means to hang up the modem. Key point: One of the juvenile tricks people play is to cause people to hang up their own modem. Once the modem connects, it goes into a different mode where it no longer accepts AT commands. However, a user can switch back to the command mode by sending the characters "+++" to the modem. Therefore, if somebody can remotely trick your PC into sending "+++ATH0", then your modem will hang up. One way of doing this is with the ping program that sends and ICMP echo to the victim, which then replies with the same contents. E.g.: ping -p 2b2b2b415448300d victim The most popular exploits for this are spoofed ICMP pings, but it can be exploited in any number of ways. For example, one may include the following in an HTML webpage: <IMG src="http://www.robertgraham.com/images/x.gif?+++ATH0"> 
ATA
Advanced Technology Attachment (ATA, HDD) 
ATAG
Authoring Tool Accessibility Guidelines (WAI) 
ATAPI
Advanced Technology Attachment Packet Interface (ATA) 
ATAPI
AT Attachment Packet Interface - a standard that allows people to connect tape drives and CD-ROMs to Enhanced IDE controllers. 
ATAPI
see Advanced Technology Attachment Packet Interface (ATAPI). 
atari-fdisk-cross
Partition editor for Atari (running on non-Atari) Atari-fdisk allows you to create and edit the partition table of a disk partitioned in Atari format. It supports both the AHDI 5.0 and ICD variations of the Atari format. It is an interactive tool with a menu similar to PC fdisk, and also supports most options of PC fdisk. 
atari800
Atari emulator for svgalib/X/curses This is an Atari emulator that can use SVGALIB, X, or plain curses. It can emulate the Atari 800, 800XL, 130XE, and 5200 systems. The Atari Operating System ROMs are not available with this package, due to copyright. You'll have to either make copies of them from an old Atari computer, or see README.Debian for other ways to obtain them. 
ATASPI
Advanced Technology Attachment Software Programming Interface (ATA) 
ATC
Address Translation Cache (CPU) 
ATC
Address Translation Controller (ATM) 
ATC
Automatic Transmission Control 
ATCA
Allied Tactical Communications Agency (org., NATO, mil.) 
ATCP
[PPP] AppleTalk Control Protocol (Apple, AppleTalk, PPP, NCP, RFC 1378) 
ATD
Asynchronous Time Division (ATM) 
atd
run jobs queued for later execution 
ATDM
Asynchronous Time Division Multiplexer (ATD) 
ATDMA
Asynchronous Time Division Multiple Access (ATD) 
ATDP
ATtention Dial Pulse (MODEM) 
ATDT
ATtention Dial Tone (MODEM) 
ATE
Asynchronous Terminal Emulation (Banyan, VINES) 
ATE
ATM Terminating Equipment (SONET, ATM) 
ATEC
Authorized Training and Education Center (MS, MOCS, MCSD, ATEC) 
aterm
Afterstep XVT - a VT102 emulator for the X window system Aterm is a colour vt102 terminal emulator, based on rxvt 2.4.8 with some additions of fast transparency, intended as an xterm replacement for users who do not require features such as Tektronix 4014 emulation and toolkit-style configurability. As a result, aterm uses much less swap space -- a significant advantage on a machine serving many X sessions. It was created with AfterStep Window Manager users in mind, but is not tied to any libraries, and can be used anywhere. 
ATES
Advanced Techniques integration into Efficient scientific Software (ESPRIT, CASE) 
ATF
Automatic Track Finding (DDS) 
atfs
The Attributed File System (AtFS). AtFS is a storage system supporting multiple versions of files and associating an arbitrary number of application defined attributes of the form "name=value" with each version. AtFS comes as a function library that is meant as an extension to the UNIX file system. It does this without the need for kernel modifications and without imposing any restrictions to existing file system applications. 
atftp
Advanced TFTP client. Interactive client for the Trivial File Transfer Protocol (TFTP). Its usage is mainly for testing and debugging a TFTP server since a client is usually implemented in BIOS' for boot from LAN setups. 
atftpd
Advanced TFTP server. Multithreaded TFTP server implementing all options specified in RFCs 1350, 2090, 2347, 2348, 2349 (multicast not implemented yet). The server currently supports being started from inetd(8) only. The server then handles new connections directly by starting new threads and kills itself after 5 minutes of inactivity. 
ATH
ATtention Hang up (MODEM) 
ATI
Advanced Telecomunications Institute (org., USA) 
ATI
Asociacion de Tecnicos de Informatica (org., Spain) 
atime
Unix jargon for "the time a file was last accessed". (cf. ctime, mtime). 
ATIP
Absolute Time In Pregroove (CD) 
ATIS
Alliance for Telecommunications Industry Solutions (org., USA) 
ATK
Andrew ToolKit (Unix) 
atk
The ATK library provides a set of interfaces for adding accessibility support to applications and graphical user interface toolkits. By supporting the ATK interfaces, an application or toolkit can be used with tools such as screen readers, magnifiers, and alternative inputdevices. 
ATKIS
Amtliches Topographisch-Kartographisches InformationsSystem 
ATL
Activex Template Library (MS, ActiceX, MSVC) 
ATL
Adaptive Threshold Learning (neural nets) 
atlas2
Automatically Tuned Linear Algebra Software,generic shared ATLAS is an approach for the automatic generation and optimization of numerical software for processors with deep memory hierarchies and pipelined functional units. The production of such software for machines ranging from desktop workstations to embedded processors can be a tedious and time consuming task. ATLAS has been designed to automate much of this process. We concentrate our efforts on the widely used linear algebra kernels called the Basic Linear Algebra Subroutines (BLAS). These libraries are built without any processor extension instructions, and should run on all processors of this general architecture, albeit less than optimally. 
ATM
Abstract Test Method (ISO 9646-1) 
ATM
Adobe Type Manager 
ATM
Asynchronous Transfer Mode 
ATM
Asynchronous Transfer Mode. High Speed (up to 155 Mbps), high bandwidth, low-delay, transport technology, integrating multiple data types (voice, video, and data), International Telecommunications Union (ITU) has selected ATM as the basis for the future broadband network because of its flexibility and suitability for both transmission and switching. It may be used in the phone and computer networks of the future. It is also a multiplexed information transfer technique of sending data in irregular time intervals using a code such as ASCII. ATM allows most modern computers to communicate with one another easily. From Glossary of Distance Education and Internet Terminology
ATM
At The Moment (slang, Usenet, IRC) 
ATM
Automatic Teller Machine 
atm-tools
Base programs for ATM in Linux, the net-tools for ATM. All the basic programs for setting up, monitoring, and tuning ATM networks. 
ATMARP
ATM Address Resolution Protocol (ATM, ARP) 
ATMP
Ascend Tunnel Management Protocol (Ascend, RFC 2107) 
ATMS
Assumption based Truth Maintenance System (AI) 
ATN
Augmented Transition Network 
ATOB
ASCII TO Binary (ASCII) 
atobm
bitmap editor and converter utilities for the X Window System 
atokx
Kana-Kanji translation system ATOKX for Linux (Installer) This package is installer to install "ATOKX for Linux" to Debian system, ATOKX is released by JUSTSYSTEM Corporation. It is commercial software and does not allow redistribution. 
ATOMM
Advanced super Thinlayer and high-Output Metal Media (Fuji) 
atool
A script for managing file archives of various types atool is a script for managing file archives of various types (tar, tar+gzip, zip etc). The main command is probably aunpack, extracting files from an archive. It overcomes the dreaded "multiple files in archive root" problem by first extracting to a unique subdirectory, and then moving back the files if possible. aunpack also prevents local files from being overwritten by mistake. 
atp
a text to PostScript converter with some C syntax highlighting atp is a text to postscript converter. It supports a special "gaudy" output mode, uses user-selectable number of columns and margins in the output, supports nroff's bold and italic conventions, and has some syntax highlighting for C and C++ sources. 
ATP
Advanced Technology Partner 
ATP
Appletalk Transaction Protocol (Apple) 
ATP
Application Transaction Program (IBM, APPC) 
ATP
Available To Promise (SCM) 
ATP2
AppleTalk Phase 2 (Apple, AppleTalk) 
ATPS
AppleTalk Printing Services (AppleTalk, Apple) 
atq
queue, examine or delete jobs for later execution 
ATR
Advanced Telecommunications Research laboratory (org., Japan) 
ATR
Answer To Reset 
ATR
Automatic Terminal Recognition 
ATRAC
Adaptive TRansform Acoustic Coding (Sony, Digital audio, CODEC) 
atrm
queue, examine or delete jobs for later execution 
atrun
run jobs queued for later execution 
ATS
Abstract Test Suite 
ATS
Administrative Terminal System 
ATS
Apple Terminal Services (Apple, AppleTalk) 
atsar
system activity reporter monitor system resources such as cpu & disk, record data for later analysis 
ATSUI
Apple Text Services for Unicode Imaging (Apple, Unicode) 
ATT
American Telephone and Telegraph, "AT&T" 
attr
A set of tools for manipulating extended attributes on filesystem objects, in particular getfattr(1) and setfattr(1). An attr(1) command is also provided which is largely compatible with the SGI IRIX tool of the same name. 
attr
Utilities for manipulating filesystem extended attributes A set of tools for manipulating extended attributes on filesystem objects, in particular getfattr(1) and setfattr(1). An attr(1) command is also provided which is largely compatible with the SGI IRIX tool of the same name. 
ATVEF
Advanced TV Enhancement Forum (org.) 
ATX
Advanced Technology eXtended [format] 
AU
Access Unit 
AUAI
Association for Uncertainty in Artificial Intelligence (org., AI) 
aub
Assembles binary files from USENET AUB automatically assembles the pieces of multi-part Usenet postings and decodes them. A user-supplied configuration file tells which newsgroups AUB should monitor. The user can also supply a "hook" program, which tests each subject header and determines whether that particular file should be downloaded or not. Resumed development resuming after 10 years of inactivity has given AUB the better documentation and the new abilities to decode Base64 files, perform NNTP authentication as well as a good deal of additional functionality. 
AUC
AUthentication Center (GSM, mobile-systems), "AuC" 
auctex
An integrated environment for writing TeX/LaTeX documents. AUC TeX can indent your text as you write it, let you run TeX/LaTeX and other LaTeX-related tools (such as a output filter or post processor) from within Emacs, and includes a wide range of Emacs macros to allow both easy insertions of LaTeX commands, and easy compilation, previewing, and printing of your TeX documents. AUC TeX also lets you browse through compiling errors TeX reports, while it moves the cursor directly to the reported error and displays documentation for that particular error. This will even work when the document is spread over several files. Currently XEmacs ships with its own AUC TeX, so this package should only be used with GNU/Emacs. (I.e., you don't need to install this package if your site uses only XEmacs.) 
audacity
A fast, cross-platform audio editor Audacity is an innovative graphical audio editor. Its main goals are speed and being cross-platform (it uses the cross-platform toolkit wxWindows, and is fully supported on Linux, Windows, Mac OS 9 and X, and FreeBSD). It is very fast. Due to its file format and internal data representation, undo and redo are constant-time operations. It also supports an unlimited number of tracks, and can import and export a number of different formats including WAV, AIFF, MP3 and Ogg Vorbis. 
Audio Bookshelf
Including the Enigma Audio Bookshelf could be stretching the definition of a Linux distribution more than a little. But this is a bootable CD product, which contains enough of a Linux operating system to turn a PC into a book reader. Any PC meeting the requirements can be turned into a Linux based book reader, regardless of the OS installed on the hard drive. Read the book yourself, or have the computer read to you. A 'special purpose/mini' distribution. 
audiofile
The Audio File library is an implementation of SGI's Audio File Library, which provides an API for accessing audio file formats likeAIFF/AIFF-C, WAVE, and NeXT/Sun .snd/.au files. This library is used by the EsounD daemon.Install audio file if you are installing EsounD or you need an API forany of the sound file formats it can handle. 
audiooss
transparent OSS emulation over NAS This is a compatibility utility that allows programs written for the popular Open Sound System (OSS) interface to run using the Network Audio System (NAS) instead. It works by preloading a library to intercept and manipulate critical system calls such as open(), read(), and write(). The emulation is not yet complete, but it already works for many programs. 
AUDIT
AUtomated Data Input Terminal 
audit
The word audit has two meanings. The first is the security audit, whereby a consulting firm comes in and validates a companies security profile. This is similar to how accounting firms review a company's books. The second term is infosec specific, and means an "auditing" subsystem that monitors actions within the system. For example, it may keep a record of everyone who logs onto a system. Such a record is known as an audit trail. 
AUDIUS
AUssenDIenstUnterstuetzungsSystem (CAS) 
AUE
Andrew User Environment (Unix) 
AUGE
Apple User Group Europe (org., Apple, user group) 
august
Tcl/Tk HTML editor. August is a Tcl/Tk HTML editor with interesting features. It is not WYSIWYG but is very useful for developing HTML pages. 
AUI
Access Unit Interface 
AUI
Asociacion de Usarios de Internet (Internet, user group, Spain, org.) 
AUI
Attachment Unit Interface (ethernet) 
AUI
Audible User Interface (UI) 
AUIS
Andrew User Interface System (Unix, UI) 
aumix
Aumix is a tty-based, interactive method of controlling a sound card mixer. It lets you adjust the input levels from the CD, microphone, and board synthesizers, as well as the output volume. Aumix can adjust audio mixers from the command line, from a script, or interactively at the console or terminal with an ncurses-based interface. The aumix-X11 package provides a GTK+ interface for using aumix with the X Window System. 
aumix
Simple text-based mixer control program aumix is a small, easy-to-use program to control the mixer of your sound card. It runs in text mode using the ncurses library, or from the command line (non-interactively). It can read default settings from a file. A wrapper script xaumix is provided that finds and invokes xterm or a replacement. This is primarily for creating the best sized terminal window. If you want a true graphical interface, install aumix-gtk instead. That has the same functionality as this one in addition to offering a nice X11 GUI. The old companion package aumix-alsa, which did take advantage of the extra facilities in the ALSA sound driver, is no longer available. This package should work fine with the ALSA driver. 
aumix
This is a program for adjusting audio mixers from the command line or scripts, or interactively at the console or a terminal with a full-screen, ncurses-based interface or a GTK-based X interface. 
AUP
Acceptable Use Policy (NFSNet) 
Aurora Sparc Project
This Sparc Linux distribution is based on Red Hat 7.3. Build 0.2 was announced on December 4, 2001. Build 0.4 (Titanium) was released September 26, 2002. Build 0.42 (Douglas) was released October 4, 2002. 
Aurox Linux
Aurox Linux is an international distribution, hailing from Poland. It is available in several european countries, in different language versions, including Polish, Czech, German, French and Spanish. Aurox is based on Red Hat, with Aurox 9.0 the most recent offering. Added to list June 11, 2003. 
AURP
Appletalk Update-based Routing Protocol (Apple, Appletalk, RFC 1504) 
AUT
Application Under Test 
authbind
Allows non-root programs to bind() to low ports This package allows a package to be started as non-root but still bind to low ports, without any changes to the application. 
authconfig
Authconfig is a terminal mode program which can configure a workstation to use shadow passwords. Authconfig can also configure asystem to be a client for certain networked user information and authentication schemes. 
authentication
In infosec, authentication is the process of identifying an individual or data. The goal of authentication is to confirm the identification of an individual, message, file, or other data. The two primary areas of authentication are user authentication (proving that Bob is who he says he is) and message authentication (proving that your nuclear missile launch orders weren't forged or corrupted). The antonym of authentication is forgery. Contrast: Authentication will identify who an individual is; authorization will identify what the individual is allowed to do. Example: When you log in with your username and give the password, you are authenticating yourself to the system. You are proving that you are you because, in theory, only you know your password. Contrast: Abstractly, anything that combats forgery is called authentication. For example, IPsec includes an Authentication Header (AH) that proves that a packet hasn't been modified in transit. However, this feature overlaps with the abstract concept of integrity: both are checked at the same time. Examples: biometrics Signature (handwriting), facial features, fingerprint, etc. smart-card A card with an on-board microprocessor that can run crypto algorithms. For example, it may store a private-key, and be able to encrypt/decrypto tokens with that key. passwords digital certificates A small file containing public or private keys. SecureID A commercial product that uses a key and the current timestamp to generate a stream of random numbers that can be verified by a server. A user has roughly 10 seconds to enter the current number displayed on the card. Contrast: Three things used for authentication: physical (what you have) car keys, subway tokens, driver's license, passport, credit cards, ID cards, smart cards knowledge (what you know) PINs, usernames/passwords, account numbers, mother's maiden name biometrics (who you are) written signature, fingerprint, what you look like, etc. See also: Authentication is often mentioned along with other key security concepts such as integrity, confidentiality, and non-repudiation. 
authentication
the verification of the identity of a person or process. In a communication system, authentication verifies that messages really come from their stated source, like the signature on a (paper) letter 
authentication
Verification of the identity of a username, password, process, or computer system for security purposes. 
authenticity
In infosec, authenticity is about making sure that the message received is the same as the message that was sent. In law, authenticity is about validating that evidence has been gathered correctly by a reliable source and hasn't been tampered with. Contrast: The terms integrity and authenticity are widely used to mean the same thing. In other situations, they have subtly different meanings (especially law). The term integrity generally describes defending against malicious change of a message once it has been sent, whereas authenticity implies some sort of validation of the sender of the message to protect against forgeries. Contrast: The terms authentication and authenticity are widely used to mean the same thing. The subtle difference is that authentication is about someone proving who they say they are, whereas authenticity is about proving that message was sent by a certain person. 
Authoritative for a Domain
I have emphasized that name servers only hold information for their own domains. Any other information they may have about another domain is cached, temporary data that has an expiration date attached to it. The domain that a name server has information about is said to be the domain that a name server is authoritative for. Alternatively we say: ``a name server is authoritative for the domain.'' For instance, the server ns2.cranzgot.co.za is authoritative for the domain cranzgot.co.za. Hence, lookups from anywhere on the Internet having the domain cranzgot.co.za ultimately are the responsibility of ns2.cranzgot.co.za, and originate (albeit through a long series of caches) from the host ns2.cranzgot.co.za. 
authorization
In infosec, the concept of authorization validates that someone has the rights to access something. For example, you are authorized to read files from my webserver, but I don't authorize you to change anything. Contrast: The first stage of authorization is generally authentication. Before you decide what an individual is allowed to do, you must first establish who they are. In some cases, authorization is independent from authentication, such as not allowing anybody to logon after midnight. 
AUTHORS
List of people who contributed to or wrote a package or document. 
auto-apt
package search by file and on-demand package installation tool auto-apt checks the file access of programs running within its environments, and if a program tries to access a file known to belong in an uninstalled package, auto-apt will install that package using apt-get. This feature requires apt and sudo to work. It also provides simple database to search which package contains a requesting file. 
auto-pgp
PGP tools for command-line and Emacs use This package provides the shell commands pgp-auto, pgp-decrypt, and pgp-pixie. It also integrates PGP into your Emacs mailreader. 
autoclass
automatic classification or clustering AutoClass solves the problem of automatic discovery of classes in data (sometimes called clustering, or unsupervised learning), as distinct from the generation of class descriptions from labeled examples (called supervised learning). It aims to discover the "natural" classes in the data. AutoClass is applicable to observations of things that can be described by a set of attributes, without referring to other things. The data values corresponding to each attribute are limited to be either numbers or the elements of a fixed set of symbols. With numeric data, a measurement error must be provided. For more information, see http://ic-www.arc.nasa.gov/ic/projects/bayes-group/autoclass/. 
autoconf
automatic configure script builder The standard for FSF source packages. This is only useful if you write your own programs or if you extensively modify other people's programs. This version of autoconf contains many changes from the previous release, version 2.13. For now, it depends on autoconf2.13 to provide compatibility. This will eventually go away, so please upgrade your autoconfiscations. 
autoconf
creates scripts to configure source code packages using templates 
autoconf
GNU's Autoconf is a tool for configuring source code and Makefiles. Using Autoconf, programmers can create portable and configurable packages, since the person building the package is allowed to specify various configuration options. You should install Autoconf if you are developing software and you would like to use it to create shell scripts that will configure yoursource code packages. If you are installing Autoconf, you will alsoneed to install the GNU m4 package. Note that the Autoconf package is not required for the end-user whomay be configuring software with an Autoconf-generated script; Autoconf is only required for the generation of the scripts, not their use. 
autoconf
GNU's Autoconf is a tool for configuring source code and Makefiles.Using Autoconf, programmers can create portable and configurable packages, since the person building the package is allowed to specify various configuration options. You should install Autoconf if you are developing software and you'd like to use it to create shell scripts which will configure yoursource code packages. If you are installing Autoconf, you will also need to install the GNU m4 package. Note that the Autoconf package is not required for the end user who may be configuring software with an Autoconf-generated script; Autoconf is only required for the generation of the scripts, not their use.-- PLEASE NOTICE ---> this version is meant to coexist with autoconf-2.5x;to that end, the various binaries are actually linked to a script which decides which version to execute. It tries to be clever and will execute2.5x if `configure.ac' is present, or if `configure.in' contains AC_PREREQand the value's 3 first letters are stringwise greater than '2.1'. Ifanything fails, you can manually select 2.13 by providing the environmentvariable WANT_AUTOCONF_2_1 set to `1' (use WANT_AUTOCONF_2_5 if you wantthe 2.5x version). 
AUTODIN
AUTOmatic DIgital Network (DMS, DISA) 
autodns-dhcp
Automatic DNS updates for DHCP autodns-dhcp uses bind 8's dynamic update features to update a zonefile with hostnames from the dhcp leases file, this is done just once for each hostname as the IP, MAC address and name are settled on the dhcp configuration to have an static zone. 
autofs
A kernel-based automounter for Linux. The kernel automounter implements an almost complete SunOS style automounter under Linux. The automounter is supported by Linux kernels 2.0.31 and higher or the 2.1.X series. Automounter support must be activated while compiling the kernel. 
autofs
Autofs controls the operation of the automount daemons. The automount daemons automatically mount filesystems when you use them and unmount them after a period of inactivity. Filesystems can include network filesystems, CD-ROMs, floppies, and other media. Install this package if you want a program for automatically mounting and unmounting filesystems. If your Red Hat Linux machine is on anetwork, you should install autofs. 
autogen
an automated text file generator AutoGen is a tool designed for generating program files that contain repetitive text with varied substitutions. This is especially valuable if there are several blocks of such text that must be kept synchronized. Included with AutoGen is a tool that virtually eliminates the hassle of processing options, keeping usage text up to date and so on. This tool allows you to specify several program attributes, innumerable options and option attributes, then it produces all the code necessary to parse and handle the command line and initialization file options. This package contains the development tools. libopts9-dev contains the static libraries and header files. libopts9 contains the shared libraries. 
autoheader
creates a template file of C #define's for use by configure. 
autoinstall
Progeny Debian auto-installation system This package contains the Progeny Debian auto-installation system. This system makes it possible to install a complete Debian system with no user interaction from a set of configuration files. The basic model is that of cloning an existing system; after installing and configuring a Debian system to taste, the configuration is "dumped" to the configuration files, along with some extra information. It currently supports flexible constraints for partitioning differently-sized disks in a logical fashion, hardware auto-configuration with discover (including configuration of X, if appropriate), network configuration via DHCP or a database based on MAC addresses, and a cross-platform design making it possible for install media for any platform to be created on any other platform. Platform-specific files are not included in this package; install the "autoinstall-<arch>" packages to install support for <arch>. 
autolog
Terminates connections for idle users Autolog terminates connections considered to be idle based on a large variety of parameters. 
automake
A tool for generating GNU Standards-compliant Makefiles. Automake is a tool for automatically generating `Makefile.in's from files called `Makefile.am'. The goal of Automake is to remove the burden of Makefile maintenance from the back of the individual GNU maintainer (and put it on the back of the Automake maintainer). The `Makefile.am' is basically a series of `make' macro definitions (with rules being thrown in occasionally). The generated `Makefile.in's are compliant with the GNU Makefile standards. 
automake
Automake is a tool for automatically generating Makefiles compliant with the GNU Coding Standards.You should install Automake if you are developing software and would like touse its capabilities of automatically generating GNU standard Makefiles. If you install Automake, you will also need to install GNU's Autoconf package. 
automake
Automake is an experimental Makefile generator. Automake was inspiredby the 4.4BSD make and include files, but aims to be portable and toconform to the GNU standards for Makefile variables and targets. You should install Automake if you are developing software and wouldlike to use its ability to automatically generate GNU standard Makefiles. If you install Automake, you will also need to install GNU's Autoconf package. 
automake
automatically create Makefile.in's from Makefile.am's 
automount
Automounting is the process where mounting and unmounting of certain filesystems is done automatically by a daemon. If the filesystem is unmounted, and a user attempts to access it, it will be automatically (re)mounted. This is especially useful in large networked environments and for crossmounting filesystems between a few machines (especially ones which are not always online). It may also be very useful for removable devices, or a few other uses, such as easy switching between a forced-on ascii conversion mount of a dos filesystem and a forced-off ascii conversion mount of the same dos fs. If you are new to Linux and dont understand what mounting and deamons are, then refer to some documentation regarding this. There are two types of automounters in linux; AMD and autofs. AMD is the automount daemon, and supposedly works like the SunOS AMD. It is implemented in user space, meaning it's not part of the kernel. It's not necessary for the kernel to understand automounting if you NFS mount to the local host, through the AMD daemon, which routes all automount filesystem traffic through the NFS system. Autofs is a newer system assisted by the kernel, meaning that the kernel's filesystem code knows where the automount mount points are on an otherwise normal underlying fs, and the automount program takes it from there. Only autofs will be described in this mini-howto. From Automount-miniHOWTO
automount
To automatically access a storage medium such as CD-ROMs and make its contents available to a computer system. 
autopilot
Monitor the DTR line of /dev/palm and run a command to start sync AutoPilot monitors the DTR line of /dev/palm, waiting for it to go from LOW to HIGH, which is used to activate a command automatically to make syncing easier. It can be used to boot up your favourite Palm syncer. 
autoproject
create a skeleton source package for a new program autoproject interviews the user, then creates a source package for a new program which follows the GNU programming standards. The new package uses autoconf to configure itself, and automake to create the Makefile. `make distcheck' succeeds. The idea is that you execute autoproject just once when you start a new project. It will ask a few questions, then create a new directory and populate it with standard files, customized for the new project. Optionally, the new package will use a command line parser generator. Currently, autoproject supports two parser generators: clig by Harald Kirsch <kir@iitb.fhg.de> (see http://wsd.iitb.fhg.de/software/), and autogen by Bruce Korb <korbb@datadesign.com> (see ftp://autogen.linuxbox.com/pub/). 
autoreconf
update configure scripts 
autorespond
email autoresponder for qmail autorespond sends an automatically generated response to emails for given address(es). It catches simple situations such as mail from a mailer-daemon, empty envelope sender, bulk precedence headers, etc. 
autorun
The autorun utility recognizes all of the CD-ROM drives on yoursystem, mounts the drive when a CD-ROM is inserted, and executes an autorun executable (if one exists) on the CD. If you want to giveusers (instead of just root) the autorun ability, you will need to adduser, exec options to the CD-ROM line in /etc/fstab. 
autoscan
help to create a configure.ac file for a software package 
AUTOSEVOCOM
AUTOmated SEcure VOice COMmunications (predecessor, SVIP, mil., USA) 
autotrace
Bitmap to vector graphics converter AutoTrace is a program for converting bitmaps to vector graphics. The aim of the AutoTrace project is the development of a freely-available application similar to CorelTrace or Adobe Streamline. In some aspects it is already better. Originally created as a plugin for the GIMP, AutoTrace is now a standalone program. 
autoupdate
updates an old configure.in file to version 2 
AUTOVON
AUTOmatic VOice Network (predecessor, DSN, DISA) 
auto_resume
This variable controls how the shell interacts with the user and job control. If this variable is set, single word simple commands without redirections are treated as candidates for resumption of an existing stopped job. There is no ambiguity allowed; if there is more than one job beginning with the string typed, the job most recently accessed is selected. The name of a stopped job, in this context, is the command line used to start it. If set to the value exact, the string supplied must match the name of a stopped job exactly; if set to substring, the string supplied needs to match a substring of the name of a stopped job. The substring value provides functionality analogous to the %? job id (see JOB CONTROL below). If set to any other value, the supplied string must be a prefix of a stopped job's name; this provides functionality analogous to the % job id. 
AUU
ATM User-to-User (ATM) 
AUX
Apple UniX (Apple, Unix), "A/UX" 
AV
Audio/Video, "A/V" 
AV
AudioVisual [macintosh] (Apple) 
ava
Algebraical Virtual Assembler for Atmel's AVR MCUs AVA is an advanced assembler and linker for Atmel's family of 8-bit AVR microcontrollers. It offers a C-like preprocessor, powerful segments, and virtual symbols. This assembler is not compatible with Atmel's assembler syntax. 
AVA
Audio-Visual Authoring 
availability
In infosec, availability describes the need that resources must be continuously available. For example, in the Kosovo war, the European forces bombed power plants in order to destroy the availability of electricity. Another example is in February of the year 2000, when massive DDoS attacks brought down major websites (making them "unavailable"). Controversy: Availability is one of the key sticking points in security. It is easy to secure things simply by making them unavailable: if a computer is turned off, nobody can hack into it. The trick to infosec is making things both available and secure. Examples of this problem are: account lockouts In order to prevent password grinding, computers will lock out accounts when too many bad passwords have been attempted. However, this means that hackers can purposely lock out accounts. firewalls and IDS Some IDSs will reconfigure firewalls, therefore spoofing attacks can cause the firewall to shut people out. fail-close/fail-open So called "proper" security will shut things down when things start to fail; for example, if the firewall crashes, it should shutdown all communication until the firewall is restarted rather than allowin traffic through unchecked. However, web-sites that demand 99.99% uptime are therefore unable to use traditional firewalls. Antonym: The opposite of the infosec term "availability" is the hacking term "DoS". See also: Availability is often mentioned along with other key security concepts such as integrity, authentication, confidentiality, and non-repudiation. 
AVAS
teile-Auftragserfassungs-, Verwaltungs- und AbrufSystem (MBAG) 
avatar
A graphical representation of you acting as an identification on 3D chat worlds. 
AVATAR
Advanced Video Attribute Terminal Assembler and Recreator (BBS) 
AVC
Audio-Visual Connection 
AVCD
Audio-Visual Computer Display 
AVD
Alternation Voice/Data 
AVE
AutoCAD Visualization Extension (AutoCAD) 
AVERT
Anti-Virus Emergency Response Team (McAfee) 
AVGA
Advanced Video Graphics Array (VGA) 
AVI
Audio Video Interleaved (MS) 
AVI
Audio Video Interleaved: a proprietary video format developed by Microsoft. It interleaves standard waveform audio and digital video frames (bitmaps) and is a popular format. Popular Linux programs such as xanim support AVI. 
aview
A high quality ASCII art image viewer and video player aview is a high quality ASCII art image viewer and video player. It is especially useful with a text-based browser such as lynx, links or w3m. It supports the pnm, pgm, pbm and ppm image formats, as well as the FLI and FLC video formats. It also supports output via stdio, (n)curses and slang and even has support for gpm. Features * High quality ASCII art rendering * Portable * Save into many formats (HTML, text, ANSI, more/less etc...) * Contrast, Bright, Gamma control * Image zooming/unzooming * Three dithering modes * Hidden "bonus" features :) * Inversion * Support for bright, dim, inverse attributes/extended character set 
AVIS
AuftragsVerwaltungs- und InformationsSYstem (MBAG) 
AVL
Adelson, Veslkij and Laudis [tree] 
AVM
AudioVisuelles Marketing und computersysteme [gmbh] (manufacturer) 
AVPD
Anchor Volume Descriptor Pointer (CD-R, UDF, ISO 9660) 
AVR
Automatic Voice Recognition 
AVR
Automatic Voltage Regulation (USV) 
avr-libc
Standard C library for Atmel AVR development Standard library used to the development of C programs for the Atmel AVR micro controllers. This package contains static libraries as well as the header files needed. 
avra
Assembler for Atmel AVR microcontrollers Avra is an assembler for the Atmel's family of AVR 8-bit RISC microcontrollers. It is is mostly compatible with Atmel's own assembler, but adds new features such as better macro support and additional preprocessor directives. 
avrp
Programmer for Atmel AVR microcontrollers Avrp is a FLASH/EEPROM programmer for Atmel's family of AVR 8-bit RISC microcontrollers. It can also program the Atmel AT89 series microcontrollers. It supports at least four different programming devices including Atmel's own AVR development board and in-circuit programming. 
avrprog
Programmer for Atmel AVR microcontrollers Programmer for Atmel AVR microcontrollers that uses PC parallel port to program the device in serial mode. The device can be programmed "in-system". It comes with a schematic of the hardware required. The hardware was designed to be efficient and inexpensive. For more information, see http://avrprog.sourceforge.net 
AVS
Address Verification System 
awe-drv
Linux AWE32 driver source and utilities Linux supports the Sound Blaster 32, and Sound Blaster AWE32, through the use of a driver written by Takashi Iwai <iwai@dragon.mm.t.u-tokyo.ac.jp>. These utilities are the package of AWE32 utilities for use with this driver, which manipulate patch files. They are required to load the vital '.SBK', or '.SF2' files, which will have been installed with your AWE32 DOS or Win95 software in \SB16\SFBANK or \Windows\System. This also includes 'gusload', for loading GUS-format patches to the AWE32 driver. This package installs the source for the AWE32 driver into /usr/src/awedrv. In order to use the awe32 driver, you must recompile your kernel, after using the install script found in this package to patch these sources into your kernel source tree (they can alternatively be manually installed into the kernel source or into a separate copy of the sound driver). There are also some converters between different patch file formats for the AWE32, and the 'sfxtest' program for testing the AWE32 driver, which are installed in /usr/lib/awe. 
awk
/awk/ 1. n. [Unix techspeak] An interpreted language for massaging text data developed by Alfred Aho, Peter Weinberger, and Brian Kernighan (the name derives from their initials). It is characterized by C-like syntax, a declaration-free approach to variable typing and declarations, associative arrays, and field-oriented text processing. See also Perl. 2. n. Editing term for an expression awkward to manipulate through normal regexp facilities (for example, one containing a newline). 3. vt. To process data using awk(1). 
AWK
al Aho, peter Weinberger, brian Kernighan (Unix) 
awk
An interpreted language for massaging text data developed by Alfred Aho, Peter Weinberger, and Brian Kernighan (the name derives from their initials). It is characterized by C-like syntax, a declaration-free approach to variable typing and declarations, associative arrays, and field-oriented text processing. 
awk
pattern scanning and text processing language 
Awk (Aho, Weinberger, and Kernighan)
A programming language useful for its patternmatching syntax, and often used for data retrieval and data transformation. A GNU version is called Gawk. 
AWOL
Abesent WithOut Leave (DFUe, Usenet, IRC) 
AWS
Apple Workgroup Server (Appletalk, Apple) 
awstats
A powerful and featureful web server log analyzer Advanced Web Statistics (AWStats) is a powerful web server logfile analyzer written in perl that shows you all your web statistics including visits, unique visitors, pages, hits, rush hours, search engines, keywords used to find your site, robots, broken links and more. Gives more detailed information and better graphical charts than webalizer, and is easier to use. Works with several web server log format as a CGI and/or from command line. Supports multiple languages (English, French, Dutch, Spanish, Italian, German, Polish, Greek...). 
AWT
Abstract Windows Toolkit (Java, Sun) 
AWTAPI
Abstract Windows Toolkit-Application Programmer Interface (AWT, API, Java) 
AX.25
a Packet Radio Protocol that offers both connected and connectionless modes of operation, and is used either by itself for point-point links, or to carry other protocols such as TCP/IP and NetRom. 
AXE
Application eXecution Environment 
axel
A light download accelerator - Console version This program tries to accelerate the downloading process by using multiple connections for one file. Starting from version 0.97, the program can use multiple mirrors for one download as well. The program tries to be as light as possible (25-30k in binary form), so it might be useful as a wget clone on byte-critical systems. 
axkit
An XML Delivery Toolkit for Apache AxKit is an XML Application Server for Apache. It provides on-the-fly conversion from XML to any format, such as HTML, WAP or text using either W3C standard techniques, or flexible custom code. AxKit also uses a built-in Perl interpreter to provide some amazingly powerful techniques for XML transformation. The emphasis with AxKit is on separation of content from presentation. The pipelining technique that AxKit uses allows content to be converted to a presentable format in stages, allowing certain platforms to see data differently to others. AxKit allows web designers to focus on web site design, content developers to work on a purely content basis, and webmasters to focus on their core competencies. AxKit is based on plugin components. This allows the web site developer to create a completely custom XML Application Server based around the AxKit API. AxKit can either automatically provide caching facilities, or you can create your own cache handler, so that XML transformations (which can be time consuming) only happen when required. The toolkit also provides ability to build component based web sites, and dynamic content. Database integration is fully supported, allowing either deliver of XML from a database, or XML generation from a database query. Dynamic web components can be built using the Perl language, making the possibilities as infinite as CGI scripts, without the potential mess that CGI programming can cause. 
axyftp-gtk
A graphical ftp program with GTK interface AxY FTP is a ftp program with a nice, wsftp like interface. Current major features are: user-friendly, intuitive interface, passive data transfers, convenient session manager window, on-line help system, recursive downloads with resume option, recursive uploads, multiple delete You need Netscape or Lynx and the axyftp-doc package to use the help system. With other browsers, just read /usr/doc/axyftp-doc/html/index.html The GTK version of axyftp is Debian's preferred version of axyftp, but there is also the axyftp-lesstif package, which is the same program using the lesstif widget set. 
axyftp-lesstif
A graphical ftp program with Lesstif interface axyftp is a ftp program with a nice, wsftp like interface. Current major features are: user-friendly, intuitive interface, passive data transfers, convenient session manager window, on-line help system, recursive downloads with resume option, recursive uploads, multiple delete You need Netscape or Lynx and the axyftp-doc package to use the help system. With other browsers, just read /usr/doc/axyftp-doc/html/index.html 
ayuda
Help for spanish-speakers This package contains a help program called 'ayuda' useful for users that speak spanish, and are new to the world of Debian GNU/Linux. The help provided covers many topics from administration to daily use.