| .arw |
Sony Alpha Digital Camera RAW image file |
| .aw |
Answer Wizard File |
| .axd |
ASP.NET Web Handler File |
| .acsm |
Adobe Content Server Message File |
| .acm |
Interplay Audio File |
| .att |
Web Form Post Data File |
| .avx |
Avid Plugin File |
| .afc |
Mass Effect 2 Audio File |
| .at3 |
ATRAC3 Audio File |
| .avastlic |
Avast! License File |
| .arx |
AutoCAD Runtime Extension File |
| .ase |
Adobe Swatch Exchange File |
| .acroplugin |
Adobe Acrobat Plug-in |
| .arc |
Norton Backup Archive |
| .aux |
LaTeX Auxiliary File |
| .azw1 |
Amazon Topaz eBook |
| .avp |
Avid Project File |
| .a5w |
Alpha Five Webpage File |
| .als |
Ableton Live Set File |
| .amxd |
Ableton Max Patch File |
| .a2c |
Alice Object File |
| .azw3 |
Amazon KF8 eBook File |
| .azw4 |
Amazon Print Replica eBook |
| .aqm |
AlpineQuest Map File |