| .arf |
WebEx Advanced Recording File |
| .asr |
ActionScript Remote Document |
| .anme |
Anime Studio Document |
| .adb |
Ada Body File |
| .aba |
Palm Address Book Archive |
| .aby |
AOL Address Book File |
| .agm |
DTS Multi-channel Pro Packer File |
| .am1 |
Adventure Maker |
| .at5 |
Lowrance Map File |
| .apf |
Adobe Profile File |
| .aam |
Authorware Map File |
| .aex |
After Effects Plug-in |
| .aao |
America's Army Map File |
| .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 |