| .ait |
Adobe Illustrator Template |
| .asnd |
Adobe Sound Document |
| .axe |
AutoRoute Map File |
| .apl |
Monkey's Audio Track Information File |
| .acv |
Photoshop Curves File |
| .adi |
AOMEI Backupper Disk Backup File |
| .avatar |
Google Talk Avatar File |
| .acb |
Adobe Photoshop Color Book File |
| .atc |
AutoCAD Tool Catalog File |
| .avc |
Kaspersky Virus Database |
| .aco |
Adobe Photoshop Color Swatch File |
| .ahu |
Adobe Photoshop HSL File |
| .alv |
Adobe Photoshop Levels File |
| .axt |
Adobe Photoshop Extract File |
| .awdb |
Access Walker Database File |
| .aea |
Ae Timer Alarm Document |
| .age3scn |
Age of Empires 3 Scenario File |
| .aia |
MIT App Inventor Source Code File |
| .awm |
AllWebMenus Project File |
| .acd-bak |
MAGIX ACID Project Backup File |
| .atm |
Vue Atmospheres File |
| .ass |
Aegisub Advanced Substation Alpha File |
| .asw |
ACDSee Slideshow Wizard File |
| .apd |
ACDSee Photo Document |