| aff | FRAMES Air Flux File |
| afg | Tablet Assembly Data |
| afm | Alphacam Flame Param Macro |
| afm | Acoustic Filter Map File |
| afo | Altair FEKO ADAPTFEKO Frequency Results Data |
| afo | Advanced File Organizer Catalog Data |
| afp | Alphacam Flame Post Data |
| afpk | Audfprint Audio Fingerprint Peaks Data |
| afploc | Mac OS X Finder AFP Location |
| afpp | Mac Apple Share Prep Data |
| afpt | Audfprint Audio Fingerprint Data |
| afr | Arachni Framework Report |
| aft | Ancestry.com Family Tree Database |
| afu | NX Motion Simulation-RecurDyn Function |
| afw | iGrafx FlowCharter Workspace |
| afz | Ancestry.com Family Tree Database Backup |
| afzplug | Corel AfterShot Pro Plug-in |
| ag4 | Microsoft Access G4 Data |
| aga | ArcGIS ArcGlobe Data |
| agb | Game Boy Advance ROM Image |
| agd | AgileGraph Data File |
| agd2 | Adobe FreeHand 7 for Mac Data |
| agdb | ANSYS DesignModeler Data |
| age | Age Encrypted Data |
| agent | Forte Agent Data |
| ageo | Dream Aquarium Fish Model |
| agf | Zemax ASCII Glass Catalog |
| aggr | Adobe Captivate Aggregate Data |
| agl | Agile XML Archive |
| aglcomp | Adobe GoLive Component Data |
