A
Object code library
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
Corel Draw AutoBackup
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
ACA
Project Manager Workbench file
ACB
ACBM Graphic image
ACC
DR-DOS Viewmax file
ACE
ACE Archiver Compression file
ACL
Corel Draw 6 keyboard accelerator file
ACM
Windows system directory file
ACM
Dynamic Link Library (DLL)
ACP
Microsoft Office Assistant Preview file
ACR
American College of Radiology file
ACT
Microsoft Office Assistant Actor file
ACT
FoxPro Foxdoc Action Diagram
ACT
Action Presentation
ACV
Used to Compress and decompress audio data
AD
After Dark screensaver
ADA
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 disk file
ADI
AutoCAD device-independent binary plotter file
ADL
QEMM Mca adaptor description library
ADM
After Dark MultiModule screensaver
ADM
Windows NT policy template
ADN
Lotus 1-2-3 Add-In file
ADP
FaxWorks Faxmodem setup file
ADP
Astound Dynamite file
ADR
After Dark Randomizer screensaver
ADR
Smart Address address book
ADS
Ada source text specification file (GNAT)
ADT
HP NewWave datafile for card applications
ADT
AdTech Fax file
ADX
Dynazip Active Delivery script
ADX
Lotus Approach dBase Index
ADX
Archetype Designer Document
AF2
ABC FlowCharter 2.0 Flowchart
AF3
ABC Flowchart
AFC
Apple Sound file
AFI
Truevision Bitmap graphic
AFM
Adobe font 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
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
ALIAS
Alias Image
ALB
JASC Image Commander album
ALL
Arts & Letters Library
ALL
WordPerfect for Windows General printer information file
ALS
Alias Image
ALT
WordPerfect Library Menu
AM
Applix SHELF Macro
AMF
Music file (Advanced Module Format)
AMG
AMGC Compressed archive
AMG
ACTOR System image
AMS
Velvet Studio music module (MOD) file
AMS
Extreme's Tracker module
ANC
Canon Computer Pattern Maker file that is a selectable list of pattern colors
ANI
Microsoft Windows Animated cursor
ANM
DeluxPaint Animation
ANN
Windows 3.x Help annotation
ANS
ANSI Text file
ANT
SimAnt for Windows saved game
AOS
Nokia 9000 Add-on software
AP
Applix Presents file
AP
WHAP Compressed Amiga archive
APC
Lotus 1-2-3 Printer driver
APD
Lotus 1-2-3 Printer driver
APF
Lotus 1-2-3 Printer driver
API
Application Program Interface; used by Adobe Acrobat
API
Lotus 1-2-3 Printer driver
APL
APL Workspace file
APP
Symphony Add-in Application
APP
dBase Application Generator Object
APP
DR-DOS Executable Application
APP
FoxPro Generated Application
APR
Employee Appraiser Performance Review file
APR
Lotus Approach 97 View file
APS
Microsoft Visual C++ file
APT
Lotus Approach Data view file
APX
Lotus Approach Paradox-Specific information file
APX
Borland C++ Appexpert database
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
Xara Studio drawing
ART
Canon Crayola art
ART
Clip Art
ART
Ray Tracer file
ART
First Publisher Raster graphic
ART
AOL Image file compressed using the Johson-Grace compression algorithm
ARX
ARX Compressed Archive
AS
Applix Spreadsheet
ASA
Microsoft Visual InterDev file
ASC
ASCII text file
ASC
PGP armored encrypted file
ASD
WinWord AutoSave file
ASD
Lotus 1-2-3 Screen driver
ASD
Microsoft Advanced Streaming Format (ASF) description file; opens with NSREX
ASD
Astound Presentation
ASE
Velvet Studio Sample file
ASF
Microsoft Advanced Streaming Format
ASF
StratGraphics Datafile
ASF
Lotus 1-2-3 Screen font
ASH
TASM 3.0 Assembly language header
ASI
Borland C++/Turbo C Assembler Include file
ASM
Assembler Language source file
ASM
Pro/E assembly file
ASO
Astound Dynamite Object
ASP
Active Server Page (an HTML file containing a Microsoft server-processed script)
ASP
Procomm Plus setup and connection script
ASP
Astound Presentation
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 Individual Software MultiModule screensaver
AU
Sun/NeXT/DEC/UNIX sound file
AU
Audio U-law (pronounced mu-law)
AUX
TeX/LaTeX Auxilliary Reference file
AUX
ChiWriter Auxilliary Dictionary file
AVA
Avagio Publication
AVB
Inculan Anti-Virus virus infected file
AVI
Microsoft Audio Video Interleaved file for Windows movie
AVR
Audio Visual Research file
AVS
Application Visualization System file
AVS
Stardent AVS-X Image
AW
HP AdvanceWrite Text file
AW
Applix Words file
AWD
FaxView Document imagine
AWK
AWK Script/Program
AWM
Animation Works Movie
AWR
Telsis file for digitally stored audio
AWS
StatGraphics Data file
AXX
ARJ compressed file from a multi-volume archive (xx = a number from 01 to 99)
A3L
Authorware 3.x library
A4L
Authorware 4.x library
A5L
Authorware 5.x library
A3M
Authorware MacIntosh file (unpackaged)
A4M
Authorware MacIntosh file (unpackaged)
A4P
Authorware file (packaged without runtime)
A3W
Authorware Windows file (unpackaged)
A4W
Authorware Windows file (unpackaged)
A5W
Authorware Windows file (unpackaged)