| !bt | BitTorrent Incomplete Download File |
| !qb | qBittorrent Partial Download |
| !ut | uTorrent File |
| $$$ | General Temporary File |
| 0 | Linux Shared Library Link File |
| 2fs | Puppy Linux Save State File |
| 2gr | VGA Graphics Configuration |
| 3ac | ASTree Compiled Program |
| 3fs | Puppy Linux Save State File |
| 3gr | VGA Graphics Configuration |
| 4dpx | 4D Database Mac OS X Plugin |
| 4fs | Puppy Linux Save State File |
| 73u | TI-73 Explorer OS Upgrade File |
| 86p | TI-86 Calculator Program |
| 89k | TI-89 Application |
| 8ba | Adobe Photoshop Plugin |
| 8bc | Adobe Photoshop 5.0 Plugin |
| 8be | Adobe PhotoDeluxe Plug-in |
| 8bf | Adobe Photoshop Filter Plugin |
| 8bi | Adobe Photoshop Plugin |
| 8bp | Adobe Photoshop Plugin |
| 8bs | Adobe Photoshop Selection Plug-in |
| 8bx | Adobe Photoshop Extension Plugin |
| 8by | Adobe PhotoDeluxe Plug-in |
| 8li | Adobe Photoshop Scripting Plugin |
| 8ly | Adobe Photoshop Plugin |
| 8xu | TI-83/84 Plus OS Upgrade |
| a5r | Macromedia Authorware v5 Runtime |
| a8s | Anim8or Script |
| abi | AbiWord Plug-in File |
| accda | Microsoft Access Add-in |
| aco | Adobe Photoshop Custom Swatch |
| acp | Microsoft Office Assistant Preview |
| acroplugin | Adobe Acrobat Plugin |
| acsauto | Avaya CMS Script |