| .abk |
Automatic Backup File |
| .axx |
AxCrypt Encrypted File |
| .aip |
Advanced Installer Project |
| .ask |
askSam Database |
| .awd |
Award BIOS Update File |
| .abc |
ActionScript Byte Code File |
| .ajp |
CCTV Video File |
| .act |
ADPCM Compressed Audio File |
| .akp |
Akai Sampler File |
| .a6p |
Authorware 6 Program |
| .avb |
Avid Bin File |
| .aep |
After Effects Project File |
| .amv |
Actions Media Video File |
| .awg |
Activeworlds Object Group File |
| .abi |
DNA Chromatogram File |
| .acr |
Audio Comparer Results File |
| .aup |
Audacity Project File |
| .ast |
ClarisWorks Assistant File |
| .acc |
Graphics Accounts Data File |
| .apng |
Animated Portable Network Graphic |
| .air |
Adobe AIR Installation Package |
| .aob |
DVD-Audio Audio Object File |
| .arr |
Amber Graphic File |
| .apr |
ArcView Project File |