| .asd |
Word AutoSave File |
| .amz |
Amazon MP3 Downloader File |
| .acm |
Interplay Audio File |
| .afc |
Mass Effect 2 Audio File |
| .at3 |
ATRAC3 Audio File |
| .ase |
Adobe Swatch Exchange File |
| .acd-zip |
Sony ACID Project With Embedded Media File |
| .als |
Ableton Live Set File |
| .amxd |
Ableton Max Patch File |
| .amf |
Additive Manufacturing File |
| .aac |
Advanced Audio Coding File |
| .aiff |
Audio Interchange File Format |
| .au |
Audacity Audio File |
| .aifc |
Compressed Audio Interchange File |
| .a2w |
Alice World |
| .abc |
ActionScript Byte Code File |
| .act |
ADPCM Compressed Audio File |
| .aud |
Video Game Compressed Audio File |
| .adx |
Approach Index File |
| .akp |
Akai Sampler File |
| .ams |
Adobe Monitor Setup File |
| .aep |
After Effects Project File |
| .amv |
Actions Media Video File |
| .aup |
Audacity Project File |