| Grp | File | Format | Related |
| | A | Object code library | |
|---|
| | A3L | Authorware 3.x library file | |
|---|
| | A3M | unpackaged Authorware MacIntosh file | |
|---|
| | A3W | unpackaged Authorware windows file | |
|---|
| | A4L | Authorware 4.x library file | |
|---|
| | A4M | unpackaged Authorware MacIntosh file | |
|---|
| | A4P | Authorware file packaged without runtime | |
|---|
| | A4W | unpackaged Authorware windows file | |
|---|
| | A5L | Authorware 5.x library file | |
|---|
| | A5W | unpackaged Authorware windows file | |
|---|
| | AAM | Authorware shocked file | |
|---|
| | AAS | Authorware shocked packet | |
|---|
| | ABF | Adobe Binary Screen Font | |
|---|
| | ABK | Corel Draw AutoBackup | |
|---|
| | ABS | Sometimes used to denote an abstract (as in an abstract or summary of a scientific paper) AutoBackup | |
|---|
| | ACE | Compression format associated with a program called The Ace Archiver | |
|---|
| | ACL | Corel Draw 6 keyboard accelerator | |
|---|
| | ACM | Windows system directory file | |
|---|
| | ACP | Microsoft Office Assistant Preview file | |
|---|
| | ACR | American College of Radiology file format | |
|---|
| | ACT | Microsoft Office Assistant Actor file | |
|---|
| | ACV | OS/2 drivers that compress and decompress audio data | |
|---|
| | AD | After Dark screensaver | |
|---|
| | ADA | Ada source text (non-GNAT) | |
|---|
| | ADB | Ada source text body (GNAT) | |
|---|
| | ADB | Appointment database used by HP 100LX organizer | |
|---|
| | ADD | OS/2 adapter drivers used in the boot process | |
|---|
| | ADF | Amiga disk file | |
|---|
| | ADI | AutoCAD device-independent binary plotter format | |
|---|
| | ADM | After Dark MultiModule screensaver | |
|---|
| | ADM | Windows NT policy template | |
|---|
| | ADP | Used by FaxWorks to do setup for fax modem interaction | |
|---|
| | ADP | Astound Dynamite file | |
|---|
| | ADR | After Dark Randomizer screensaver | |
|---|
| | ADR | Smart Address address book | |
|---|
| | ADS | Ada source text specification (GNAT) | |
|---|
| | AF2 | ABC Flowchart file | |
|---|
| | AF3 | ABC Flowchart file | |
|---|
| | AFM | Adobe font metrics | |
|---|
| | AI | Adobe Illustrator drawing | |
|---|
| | AIF, AIFF | 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 | |
|---|
| | AIP | Audiosoft intra | |
|---|
| | AIS | ACDSee Image Sequence file | |
|---|
| | AIS | Velvet Studio Instruments | |
|---|
| | AKW | Contains all A-keywords in the RoboHELP Help project Index Designer not associated with topics | |
|---|
| | ALAW | European telephony format audio | |
|---|
| | ALB | JASC Image Commander album | |
|---|
| | ALL | Arts & Letters Library | |
|---|
| | AMI | amifile | |
|---|
| | AMS | Velvet Studio music module (MOD) file | |
|---|
| | AMS | Extreme's Tracker module format | |
|---|
| | ANC | Canon Computer Pattern Maker file that is a selectable list of pattern colors | |
|---|
| | ANI | Animated cursor in a Microsoft Windows system | |
|---|
| | ANS | ANSI text file | |
|---|
| | ANT | SimAnt for Windows saved game file | |
|---|
| | API | "Application Program Interface file; used by Adobe Acrobat" | |
|---|
| | APR | Lotus Approach 97 file | |
|---|
| | APS | Microsoft Visual C++ file | |
|---|
| | ARC | LH ARC (old version) compressed archive | |
|---|
| | ARI | Aristotle audio file | |
|---|
| | ARJ | Robert Jung ARJ compressed archive | |
|---|
| | ART | Xara Studio drawing | |
|---|
| | ART | Canon Crayola art file | |
|---|
| | ART | Clip Art file format | |
|---|
| | ART | Another Ray Tracer format | |
|---|
| | ART | Used by AOL to designate files compressed using the Johson-Grace compreession algorithm | |
|---|
| | ASA | Microsoft Visual InterDev file | |
|---|
| | ASC | ASCII text | |
|---|
| | ASC | PGP armored encrypted file | |
|---|
| | ASD | WinWord AutoSave | |
|---|
| | ASD | "Microsoft Advanced Streaming Format (ASF) description file; opens with NSREX" | |
|---|
| | ASE | Velvet Studio sample | |
|---|
| | ASF | Microsoft Advanced Streaming Format file | |
|---|
| | ASM | Assembler language source file | |
|---|
| | ASM | Pro/E assembly file | |
|---|
| | ASO | Astound Dynamite Objects | |
|---|
| | ASP | Active Server Page (an HTML file containing a Microsoft server-processed script) | |
|---|
| | ASP | Procomm Plus setup and connection script | |
|---|
| | ASP | Astound Presentation file | |
|---|
| | 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 | |
|---|
| | 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) file format | |
|---|
| | AVB | Inculan Anti-Virus virus infected file | |
|---|
| | AVI | Microsoft Audio Video Interleaved file format for Windows movie | |
|---|
| | AVR | Audio Visual Research file format | |
|---|
| | AVS | Application Visualization System format | |
|---|
| | AWD | FaxView document | |
|---|
| | AWR | Telsis file extension format for digitally stored audio. | |
|---|
| | AXX | ARJ compressed files from a multi-volume archive (xx = a number from 01 to 99) | |
|---|
| Konec (vybráno 99 záznamů v 0.67 sec) |