| .acrodata |
Acrobat Data File |
| .asws |
Avast! Skin File |
| .aswcs |
Avast! Compressed Skin File |
| .axp |
CDBurnerXP Audio Compilation File |
| .ado |
Adobe Photoshop Duotone Options File |
| .amp |
Adobe Photoshop Curves Map File |
| .acbl |
Adobe Color Book Legacy File |
| .acw |
Windows Accessibility Wizard File |
| .ave |
Avid User File |
| .awcav |
ActiveWorlds Custom Avatar File |
| .antispam5 |
Personal AntiSpam Settings File |
| .aiu |
Advanced Installer Updates Configuration File |
| .abs |
Absolute Database File |
| .agg |
Bulk Data File |
| .agtemplate |
Adobe Lightroom Template |
| .acs2 |
AIMP Skin File |
| .acs3 |
AIMP Skin File |
| .a7l |
Authorware 7 Library |
| .a7d |
Authorware 7 Model |
| .acelive |
Acelive Broadcast File |
| .animeexport |
Anime Studio Export Profile Document |
| .amgp |
antimicro Profile File |
| .arl |
AOL Organizer File |
| .aois |
CFS Console Add-on Installer Settings File |