| .afd |
Alphacam Flame Drawing |
| .ashdisc |
Ashampoo Burning Studio Image |
| .ashprj |
Ashampoo Burning Studio Project |
| .ashbak |
Ashampoo Backup Archive |
| .abkprj |
Ashampoo Backup Project |
| .alf |
ACT! Lookup File |
| .any |
AnyRail Layout Plan |
| .arg |
AutoCAD Profile |
| .aggr |
Adobe Captivate Aggregate File |
| .admx |
Group Policy Administrative Template File |
| .aaf |
Advanced Authoring Format File |
| .aps |
Visual C++ Resource File |
| .ain |
Source Engine Compiled AI Nodegraph File |
| .abf |
Adobe Binary Screen Font File |
| .acp |
Alfresco Content Package |
| .adts |
Audio Data Transport Stream File |
| .arsc |
Android Package Resource File |
| .accde |
Access Execute Only Database |
| .accdr |
Access Runtime Application |
| .accda |
Access Add-in File |
| .accdc |
Microsoft Access Signed Package |
| .asec |
Android Secure Application File |
| .apnx |
Amazon Page Number Index File |
| .autoplay |
AutoPlay Media Studio Project File |