| Adobe Extension Script | |
| Adobe Systems | |
| Ads |
Windows
Mac OS
| .aaui | Adobe Acrobat UI Settings Format |
| .accda | Microsoft Access 2007/2010 Add-in Format |
| .accdu | Microsoft Access 2007/2010 Database Wizard Format |
| .acroplugin | Adobe Acrobat Plug-in Format |
| .addon | CFS Console Add-on Format |
| .aip | Adobe Illustrator Plugin Format |
| .alp | Ableton Live Pack Format |
| .amxx | AMX Mod X Plug-in Format |