| .abcddb |
Apple Address Book Contact List |
| .alm |
Alpha Five Library |
| .adblock |
Alpha Five Library Temporary File |
| .a5wcmp |
Alpha Five Web Components File |
| .agg |
Bulk Data File |
| .abx |
WordPerfect Address Book |
| .agx |
AGT Game File |
| .aglib |
Adobe Lightroom Library |
| .agmodule |
Adobe Lightroom Module |
| .agtoolkit |
Adobe Lightroom Toolkit |
| .acs2 |
AIMP Skin File |
| .acs3 |
AIMP Skin File |
| .a7l |
Authorware 7 Library |
| .a7d |
Authorware 7 Model |
| .axa |
Annodex Audio File |
| .axv |
Annodex Video File |
| .a3x |
Compiled AutoIt v3 Script |
| .abcdp |
Address Book CoreData Person File |
| .aan |
Pro Tools Elastic Audio Analysis File |
| .autosave |
Fusion Auto-save File |
| .abu |
Asus Apps Backup File |
| .afzplug |
AfterShot Pro Plugin Archive |
| .aecache |
After Effects Cache File |
| .acid |
ACID Encrypted File |