| aip | Adobe Illustrator Plugin |
| alt | Microsoft Dynamics AX Application Label Temporary File |
| amxx | AMX Mod X Plugin |
| aoi | Microsoft Dynamics AX Application Object Index |
| apln | Adobe InDesign Plug-in |
| appimage | AppImage Image |
| aria2 | aria2 Control Data |
| artask | BMC Remedy User Tool Shortcut |
| asl | Adobe Photoshop Layer Style |
| ast | ASTree Program |
| asv | Adobe Photoshop Selective Color |
| atf | Adobe Photoshop Transfer Functions |
| ava | Adobe Photoshop Variations File |
| avh | Pioneer AVH Firmware Update |
| awc | Emulex AWC Firmware Update |
| axx | AxCrypt Encrypted File |
| backup | Backup Copy File |
| bak | Backup Copy File |
| bcs | Sonic Foundry Batch Converter Script |
| bea | BEA WebLogic Platform License |
| beb | EEC Analyzer Data |
| bem | Babel Enterprise Module |
| bfe | Bcrypt Encrypted Data |
| bfu | Brute Force Uninstaller Script |
| bi2 | WD TV Live Firmware |
| bio | General BIOS File |
| bj | Sound Forge Batch Job |
| bk | Backup Copy File |
| blg | Windows Binary Performance Log |
| blj | Sagem Fast 3202 Firmware |
| blr | Sagem Fast 3202 Firmware |
| bnc | Bojanov Encryptor File |
| bnd | DB2 CLI Bind File |
| bpkey | Blender Publisher License Key |
| bpz | Easy Blue Print Symbol Library |
