| A | Static Library | Developer Files | 7 | 1 |
| A-0 | Unknown File Type | Uncommon Files | 1 | 1 |
| A00 | Split Multi-volume ARJ Compressed File Archive | Compressed Files | 7 | 2 |
| A01 | Split Multi-volume ARJ Compressed File Archive |
Compressed Files
| 7 | 2 |
| A02 | Split Multi-volume ARJ Compressed File Archive |
Compressed Files
| 7 | 2 |
| A021 | Unknown File Type |
Uncommon Files
| 1 | 1 |
| A03 | Split Multi-volume ARJ Compressed File Archive |
Compressed Files
| 7 | 2 |
| A04 | Split Multi-volume ARJ Compressed File Archive |
Compressed Files
| 7 | 2 |
| A05 | Split Multi-volume ARJ Compressed File Archive |
Compressed Files
| 7 | 2 |
| A06 | Split Multi-volume ARJ Compressed File Archive |
Compressed Files
| 7 | 2 |
| A07 | Split Multi-volume ARJ Compressed File Archive |
Compressed Files
| 7 | 2 |
| A08 | Split Multi-volume ARJ Compressed File Archive |
Compressed Files
| 7 | 2 |
| A09 | Split Multi-volume ARJ Compressed File Archive |
Compressed Files
| 7 | 2 |
| A1 | Free Pascal Archive |
Compressed Files
| 1 | 1 |
| A10 | Split Multi-volume ARJ Compressed File Archive |
Compressed Files
| 7 | 2 |
| A11 | Split Multi-volume ARJ Compressed File Archive |
Compressed Files
| 6 | 1 |
| A1J | Unknown File Type |
Uncommon Files
| 1 | 1 |
| A2 | Golden Orchard Apple II CD Rom File | Data Files | 2 | 1 |
| A2C | Alice Object File | 3D Image Files | 1 | 1 |
| A2L | ASAP2 ECU Description File | CAD Files | 1 | 1 |
| A2M | TS-AudioToMIDI Settings File | Settings Files | 3 | 2 |
| A2P | Adlib Tracker II Pattern File | Audio Files | 1 | 1 |
| A2R | KittyXplorer Encrypted Archive | Encrypted Files | 1 | 1 |
| A2W | Alice World |
Developer Files
| 2 | 2 |
| A3 | Golden Orchard Apple II CD Rom File |
Data Files
| 2 | 1 |
| A32 | Split Multi-volume ARJ Compressed File Archive |
Compressed Files
| 6 | 1 |
| A349 | Unknown File Type |
Uncommon Files
| 1 | 1 |
| A3D | Alternativa Player 3D Export File |
3D Image Files
| 2 | 2 |
| A3K | Yamaha A3000 Sampler Data |
Audio Files
| 1 | 1 |
| A3L | Authorware 3 Library |
Data Files
| 1 | 1 |
| A3M | Authorware 3 Macintosh File |
Data Files
| 1 | 1 |
| A3W | Authorware 3 Windows File |
Data Files
| 1 | 1 |
| A4J | Unknown File Type |
Uncommon Files
| 1 | 1 |
| A4L | Authorware 4 Library |
Data Files
| 1 | 1 |
| A4M | Adobe Authorware Unpackaged File |
Data Files
| 1 | 1 |
| A4P | A4Desk Pro Project File | Web Files | 2 | 2 |
| A4R | Adobe Authorware Package Course Data |
Data Files
| 1 | 1 |
| A4W | Authorware 4 Windows File |
Data Files
| 1 | 1 |
| A50 | Adobe Authorware Library File | Text Files | 1 | 1 |
| A52 | Atari 5200 ROM | Game Files | 3 | 2 |
| A5L | Authorware 5 Library |
Data Files
| 1 | 1 |
| A5W | Alpha Five Webpage File |
Web Files
| 2 | 1 |
| A65 | Authorware 6.5 File |
Data Files
| 1 | 1 |
| A68 | PDP-10 Algol-68 Compiler Source |
Developer Files
| 1 | 1 |
| A6P | Authorware 6 Program | Executable Files | 1 | 1 |
| A8 | Cubicomp PictureMaker 3D Animation Data | Raster Image Files | 1 | 1 |
| A83 | EightyOne Sinclair ZX81 ROM File | System Files | 1 | 1 |
| A86 | A86 Assembly Language Source Code |
Developer Files
| 1 | 1 |
| A8S | Anim8or Script |
Developer Files
| 1 | 1 |
| AA | Audible Audio Book File |
Audio Files
| 3 | 2 |
| AA3 | ATRAC Audio File |
Audio Files
| 4 | 1 |
| AA48 | Unknown File Type |
Uncommon Files
| 1 | 1 |
| AAA | Sybase SQL Anywhere Temporary Data | Temporary Files | 1 | 1 |
| AAB | Adobe Authorware Binary Data |
Data Files
| 1 | 1 |
| AAC | Advanced Audio Coding File |
Audio Files
| 13 | 1 |
| AAE | Sidecar Image Format File |
Data Files
| 3 | 1 |
| AAF | Advanced Authoring Format File | Video Files | 5 | 1 |
| AAM | Authorware Map File |
Data Files
| 2 | 2 |
| AAO | America's Army Map File |
Game Files
| 2 | 2 |
| AAP | Apollo Advanced Playlist |
Settings Files
| 1 | 1 |
| AAR | Axis Archive |
Data Files
| 1 | 1 |
| AAS | Adobe Authorware Shocked Packet File |
Data Files
| 7 | 7 |
| AAT | Arcinfo Line Data Attribute Data | GIS Files | 1 | 1 |
| AAUI | Acrobat User Interface File | Plugin Files | 1 | 1 |
| AAWDEF | Ad-Aware Definitions File |
Settings Files
| 1 | 1 |
| AAX | Audible Enhanced Audiobook File |
Audio Files
| 1 | 1 |
| AAXPLUGIN | Pro Tools Audio Plugin |
Plugin Files
| 1 | 1 |
| AB | Android ADB Backup File | Backup Files | 1 | 1 |
| AB1 | DNA Electropherogram File |
Data Files
| 7 | 1 |
| AB2 | Print Shop Address Book File |
Data Files
| 1 | 1 |
| AB3 | PhotoImpact 3 Album File |
Data Files
| 1 | 1 |
| AB4 | AB4 Accounting & Business Data File |
Data Files
| 1 | 1 |
| AB6 | ABStat Data |
Data Files
| 1 | 1 |
| ABA | Palm Address Book Archive |
Backup Files
| 3 | 3 |
| ABB | AlphaBB Data |
Data Files
| 1 | 1 |
| ABC | ActionScript Byte Code File |
Developer Files
| 8 | 4 |
| ABD | Adventure Builder Data |
Data Files
| 3 | 3 |
| ABF | Adobe Binary Screen Font File | Font Files | 2 | 2 |
| ABG | FIFA World Cup Game Data File |
Game Files
| 1 | 1 |
| ABI | DNA Chromatogram File |
Data Files
| 10 | 3 |
| ABK | Automatic Backup File |
Backup Files
| 5 | 3 |
| ABL | ANNO 2070 Scenario Data |
Game Files
| 7 | 3 |
| ABM | Music Album |
Audio Files
| 6 | 5 |
| ABM FILE EXTENSION | Album File |
3D Image Files
| 1 | 1 |
| ABO | Applix Builder File |
Developer Files
| 2 | 2 |
| ABP | AVS Barcode Profile |
Data Files
| 1 | 1 |
| ABR | Adobe Photoshop Brushes File |
Uncommon Files
| 2 | 1 |
| ABS | Absolute Database File | Database Files | 2 | 2 |
| ABT | Annotated Braille Text File |
Data Files
| 2 | 2 |
| ABU | Asus App Backup File |
Backup Files
| 2 | 2 |
| ABU1 | ASUS Backup File |
Backup Files
| 1 | 1 |
| ABW | AbiWord Document |
Text Files
| 1 | 1 |
| ABX | WordPerfect Address Book |
Database Files
| 2 | 1 |
| ABY | AOL Address Book |
Data Files
| 1 | 1 |
| ABZ | Alpha Black Zero Game File |
Game Files
| 1 | 1 |
| AC | Autoconf Script |
Executable Files
| 6 | 4 |
| AC2 | SPICE AC/frequency Domain Output |
Data Files
| 1 | 1 |
| AC3 | Audio Codec 3 File |
Audio Files
| 7 | 1 |
| AC7 | SPICE AC/Frequency Domain Output File |
Data Files
| 2 | 2 |
| ACB | Adobe Photoshop Color Book File |
Settings Files
| 4 | 2 |
of 7 
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