| agx1 | Adobe FreeHand for Mac Plug-in |
| ahd | Microsoft Dynamics AX Online Help Data |
| ahi | Microsoft Dynamics AX Online Help Index |
| ahq | Creative Audio HQ Plug-in |
| ai65 | Adobe PageMaker 6.5 for Mac Plugin |
| aip | Adobe Illustrator Plugin |
| aix | IBM AIX System File |
| aiz | Aero AIO Plug-in |
| ajz | Archos Jukebox Recorder Firmware |
| akwf | Oracle ZFS Storage Appliance Workflow |
| alh5 | Adobe PageMaker 5 for Mac Add-in |
| almn | Mac OS X Location Manager Module |
| alt | Microsoft Dynamics AX Application Label Temporary File |
| amio | Adobe Audition AMIO Plugin |
| amxx | AMX Mod X Plugin |
| aoi | Microsoft Dynamics AX Application Object Index |
| aol | America Online |
| aplg | Audials One Plug-in |
| apln | Adobe InDesign Plug-in |
| aplp | Audials One Plug-in Package |
| appdownload | AppStore Partially Downloaded App |
| appex | Mac OS X Application Extension |
| appimage | AppImage Image |
| aqq | AQQ Plug-in |
| aria2 | aria2 Control Data |
| artask | BMC Remedy User Tool Shortcut |
| asl | Adobe Photoshop Layer Style |
| assistant | HP Printer Utility for Mac Assistant Plugin |
| ast | ASTree Program |
| asv | Adobe Photoshop Selective Color |