| 0xe | F-Secure Renamed EXE File |
| 386 | Windows 3.x Virtual Device Driver |
| 3dsx | Nintendo 3DS Homebrew Launcher |
| 73k | TI-73 Application |
| 83p | TI-83 Calculator Program |
| 8bc | Adobe Photoshop 5.0 Plug-in |
| 8be | PhotoDeluxe Plug-in |
| 8bi | Adobe Photoshop Plug-in |
| 8bi8 | Adobe Photoshop Plug-in |
| 8bl | Adobe Photoshop Plug-in |
| 8bs | Adobe Photoshop 5.0 Selection Plug-in |
| 8by | PhotoDeluxe Plug-in |
| 8xp | TI-83/84 Plus Calculator Program |
| a4r | Macromedia Authorware Packaged File without Runtime |
| a5r | Macromedia Authorware Packaged File without Runtime |
| a6r | Macromedia Authorware Packaged File without Runtime |
| a7r | Macromedia Authorware Packaged File without Runtime |
| aaui | Acrobat User Interface |
| acm | Microsoft Audio Compression Manager Codec |
| acroplugin | Adobe Acrobat Plug-in |
| action | Automator Action |
| acx | Atari ST Executable |
| addon | CFS Console Add-on |
| aos | Nokia Phone Add-on Software |
| aplg | Audials Plug-in |
| aplp | Audials Plug-in Package |
| app | SymbianOS Compiled Application |
| arx | AutoCAD Runtime Extension |
| arx | Autodesk AutoCAD Runtime Extension |
| ary | SmartStart Array Configuration Script |
