| Extension |
Meaning / Link |
| .A |
UNIX Library,
ADA Program |
| .A01 |
ARJ Multi-volume
Compressed Archive (can be 01 to 99) |
| .A11 |
Graphic |
| .A3K |
Yamaha A3000
Sampler File |
| .A3L |
Authorware
3.x Library |
| .A3M |
Unpackaged Authorware
MacIntosh File |
| .A3W |
Unpackaged Authorware
Windows File |
| .A4L |
Authorware
4.x Library |
| .A4M |
Unpackaged Authorware
MacIntosh File |
| .A4P |
Authorware
File Without Runtime |
| .A4W |
Unpackaged Authorware
Windows File |
| .A5L |
Authorware
5.x Library |
| .A5W |
Unpackaged Authorware
Windows File |
| .A86 |
A86
Assembler Program File |
| .A_T |
A-Train |
| .AA |
Audio Book File |
| .AAM |
Authorware
Shocked File |
| .AAS |
Authorware
Shocked Packet |
| .AB |
Applix
Builder File |
| .AB6 |
AB Stat Data |
| .AB8 |
AB Stat Data |
| .AB$ |
AutoCAD
Spooled Plot File |
| .ABC |
Flowchart |
| .ABD |
AmBiz Bonus
Calculator Data File |
| .ABF |
Adobe
Binary Screen Font |
| .ABK |
Corel
Draw AutoBackup, Any Automatic Backup |
| .ABM |
HitPlayer Audio
Album File, Album File (various) |
| .ABO |
Applix
Builder Turbo File |
| .ABR |
Photoshop
Brush |
| .ABS |
Abstracts, MPEG
Audio Sound File [MPEG],
PC GNU Compiler Output, Abscissa Data File |
| .ABW |
AbiWord
Document File |
| .ACA |
MS Agent Character
File, Project Manager Workbench File |
| .ACB |
ACBM Graphic Image,
Archived Data File |
| .ACC |
DR-DOS
Viewmax File |
| .ACD |
Chromeleon Channel
Raw Data, Sonic Foundry
Acid Music File, MS Agent Character Definiton File |
| .ACE |
The Ace Archiver
Compressed File |
| .ACF |
MS Agent Character
File, Photoshop Custom Filter |
| .ACG |
MS Agent Preview
File |
| .ACI |
ACI
Development Appraisal |
| .ACL |
Corel
Draw 6 Keyboard Accelerator |
| .ACM |
Audio Compression
Manager Driver (Windows), Photoshop
Command Button, Windows System File, ACBM Image File, Interplay
Compressed Sound File |
| .ACO |
Photoshop
Color Swatch File |
| .ACP |
MS
Office Assistant Preview File |
| .ACR |
American College of
Radiology File |
| .ACS |
MS Agent Character
File |
| .ACT |
MS
Office Actor Program File, FoxPro
Documenting Wizard Action Diagram, Photoshop
Color Table |
| .ACV |
OS/2
Audio Drivers, Photoshop
Saved Curve |
| .AD |
AfterDark Screen
Saver |
| .ADA |
ADA Program File,
ADA Package Body |
| .ADB |
HP Organizer
Appointment Database |
| .ADC |
Chromeleon Demo
Data File, Scanstudio 16-color Bitmap Graphic File, Lingvo
Dictionary Text File |
| .ADD |
OS/2
Adapter Device Driver, Adobe
Pagemaker File |
| .ADE |
MS
Access Project Extension, ADC Audio File |
| .ADF |
Adapter Description
File, Admin Config File, Amiga
Disk File (Uncompressed 901120 byte DD Diskimage) |
| .ADI |
AutoCAD
Plotter File |
| .ADL |
QEMM
MCA Adapter Description Library [MCA] |
| .ADM |
After Dark Screen
Saver Module, Windows NT Policy Template |
| .ADN |
1-2-3 Add In
Utility, MS
Access Blank Project Template |
| .ADO |
Photoshop
Duotone Options |
| .ADP |
FaxWorks Modem
Setup File, MS
Access Project, Astound
Dynamite File, AOLserver Dynamic Page File [AOL] |
| .ADR |
After Dark Random
Screen Saver Module, Smart Address Address Book |
| .ADS |
ADA Package
Specification |
| .ADT |
HP NewWave Card
Application Data File, Lingvo Dictionary File, AdTech Fax File |
| .ADV |
GUS
Virtual Device Driver |
| .ADX |
Lotus
Approach Index File, Archetype Designer Document, Dynazip
Active Delivery Script |
| .ADZ |
GZ-Packed Amiga
Disk File (see ADF) |
| .AE |
SoftQuad
Author/Editor File |
| .AEH |
iPer
Advanced Embedded Hypertext |
| .AEP |
ArcExplorer Project
File |
| .AEX |
PGP Armored
Extracted Public Encryption Key [PGP] |
| .AF2 |
ABC
Flowchart (Now Micrografx FlowCharter) |
| .AF3 |
ABC
Flowchart (Now Micrografx FlowCharter) |
| .AFC |
Apple Sound File |
| .AFI |
Truevision Bitmap
Graphic |
| .AFL |
Lotus
Font |
| .AFM |
Outline Font
Metric, HP NewWave Cardfile Application |
| .AFP |
Flowchart Symbol
Palette |
| .AFS |
Filter
Factory Photoshop Filter [Added] |
| .AFT |
Flowchart Template |
| .AFW |
Flowchart Work Area |
| .AG |
Applix
Graphic |
| .AG4 |
Access
G4 File |
| .AHS |
Photoshop
Halftone Screens |
| .AI |
Adobe
Illustrator Vector Graphic, Corel Trace Drawing |
| .AIF |
Knowledgeware
Setup Information, Audio Interchange File [Viewer]
|
| .AIM |
AOL Instant
Messenger File [AOL] |
| .AIN |
AIN Compressed
Archive |
| .AIO |
APL File Transfer
Format |
| .AIR |
Align It! Resource
File |
| .AIS |
Array of Intensity
Samples (Graphic), Velvet Studio Instruments, ACDSee Image
Sequence File |
| .AIX |
HP NewWave Cardfile
Application Data |
| .AKF |
Acrobat
Key File |
| .AKW |
RoboHELP
Help Project Index File |
| .ALB |
JASC Image
Commander Album |
| .ALC |
Norton Internet
Security Ad Server File |
| .ALL |
Arts
& Letters Symbols and Characters, WordPerfect
Printer Info |
| .ALS |
Alias Image |
| .ALT |
WordPerfect
Menu File |
| .ALV |
Photoshop
Levels |
| .AM |
Applix
SHELF Macro |
| .AMF |
Advanced Module
Format Music File, DSMIA/Asylum Module Music
|
| .AMG |
AMGC
Compressed Archive, AMG ACTOR System Image |
| .AMI |
Cocreate
SolidDesigner Annotation File |
| .AMP |
Photoshop
Arbitrary Map Settings |
| .AMS |
Extreme's Tracker
Module Format, Photoshop Monitor
Setup, Velvet Studio Module |
| .AN |
Groundworks
Text File |
| .ANC |
Canon Computer
Pattern Maker File |
| .ANI |
Animated Cursor
[Viewer] |
| .ANL |
Project Analyzer
Saved Analysis |
| .ANM |
DeluxPaint
Animation |
| .ANN |
Help Annotation |
| .ANS |
ANSI Graphic
[ANSI], MS
Word Text and Layout |
| .ANT |
SimAnt for Windows
Saved Game File |
| .AOS |
Nokia Add-on
Software |
| .AOT |
ZenWorks
Application Binary Object Template File |
| .AP |
Applix
Presents File, WHAP-Compressed Amiga Archive |
| .APC |
Lotus
Printer Driver Characters, Centura
Team Developer Compiled Application File |
| .APD |
Lotus
Printer Driver, Centura
Team Developer Dynamic Application Library File |
| .APF |
Lotus
Printer Driver Fonts, Acrobat Profile File, Homesite
Project File |
| .API |
Lotus
Printer Driver Info, Photoshop
Ink Colors Setup, Application Program Interface |
| .APL |
Centura
Team Developer Application Library File, APL Workspace File |
| .APP |
R:Base, Symphony,
DR-DOS, FoxPro
(or other) Application, Centura
Team Developer Normal Mode Application File |
| .APR |
Lotus
Approach 97 File, ArcView
Project File |
| .APS |
MS
Visual C++ File |
| .APT |
Centura
Team Developer Text Mode Application File, Lotus
Approach Data View File |
| .APX |
Lotus
Approach Paradox-specific Information File, Borland
C++ Appexpert Database |
| .AQ |
Applix
Data |
| .ARC |
Archive File,
Compressed File |
| .ARF |
Automatic Response
File |
| .ARI |
Aristotle Audio
File, Compressed Archive |
| .ARJ |
Compressed Archive |
| .ARK |
Compressed Archive |
| .ARL |
AOL Organizer File
[AOL] |
| .ARR |
Atari Cubase
Arrangement |
| .ART |
Clip Art File, Xara
Studio Drawing, Canon Crayola Art File, Another Ray Tracer
Format, AOL Johnson-Grace Compressed File [AOL],
First Publisher Raster Graphic |
| .ARX |
Compressed Archive |
| .AS |
Applix
Spreadsheet |
| .ASA |
MS Visual InterDev
File, Active Server Document |
| .ASC |
ASCII Text File
[ASCII], PGP Armored
Encrypted File [PGP] |
| .ASD |
MS
Word Automatic Backup, Lotus
Screen Driver, MS Advanced Streaming Format Description File
|
| .ASE |
Velvet Studio
Sample |
| .ASF |
MS Active Streaming
File, Lotus Screen Font,
APL*Plus/PC APL Shared File, Electronic Arts Music File,
Statgraphics Data |
| .ASH |
TASM Assembler
Header |
| .ASI |
Borland
Assembler Include |
| .ASK |
askSam
Database |
| .ASM |
Assembler Source
Language (various) |
| .ASO |
Assembler Object, Astound
Dynamite Objects |
| .ASP |
Active
Server Page, Procomm
Plus ASPECT Program, Astound
Presentation File, Photoshop
Photo File Index, Photoshop
Separation Setup |
| .ASR |
Automap Route, Photoshop
Scratch Area |
| .AST |
Astound
Multimedia File, Photoshop
Separation Tables, Claris
Works Assistant File |
| .ASV |
DataCAD
Autosave File, Photoshop
Selective Color |
| .ASX |
MS Windows Media
Active Stream Redirector File, Cheyenne Backup Script, Video
File |
| .AT2 |
Aldus Persuasion
2.0 Auto Template |
| .ATF |
Photoshop
Transfer Function |
| .ATM |
Adobe Type Manager
Data File |
| .ATT |
AT&T Group 4
Bitmap (fax) |
| .ATW |
AnyTime Deluxe PIM
File [PIM] |
| .ATY |
association type - exported
by 3D Topicscape |
| .AU |
Music File
(various) [Viewer] |
| .AUD |
Audio File used by Westwood
Studios for various games |
| .AUX |
TeX/LaTeX
Auxilliary Reference File, ChiWriter Auxilliary Dictionary File |
| .AVA |
Avagio Publication |
| .AVB |
Inculan Anti-Virus
Virus Infected File |
| .AVI |
Audio
Video Interleave File [Viewer] |
| .AVR |
Audio Visual
Research Sound File |
| .AVS |
Animation File,
Application Visualization System Format, Stardent AVS-X Image, Winamp
Advanced Visualization Studio File |
| .AVX |
ArcView
File |
| .AW |
HP AdvanceWrite
Text File, Applix Word
File |
| .AWD |
Faxviewer Document |
| .AWK |
AWK Script |
| .AWM |
Animation Works
Movie |
| .AWR |
Telsis Digital
Audio File |
| .AWS |
StatGraphics Data
File |
| .AXL |
ArcIMS
XML Project File [XML] |
| .AXR |
Telsis Digital
Audio File |
| .AXT |
ASCII Application
Object Template, Photoshop
Replace Color/Color Range |
| |
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