| 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 |
| agldei | Adobe GoLive Template Data |
| aglib | Adobe Photoshop Lightroom Library |
| aglsl | Adobe GoLive Site Locator Data |
| agprefs | Adobe Photoshop Lightroom Preferences Data |
| ags | AGS Data File |
| agsc | eXtendable Wad Editor AGSC Data |
| agsetup | Ag Leader InCommand Setup Data |
| agt | PeerAgent Typed Executable E-mail Data |
| agtoolkit | Adobe Photoshop Lightroom Toolkit Data |
| agw | Aspen Graphics Window Data |
| agx | IBM Rational Rose XDE Data |
| ah | SEED AH Seismogram Data |
| ahb | AIM High Briefcase Report Data |
| ahead | SCAMP FITS Image Header |
| ahk | AutoHotkey Script |
| ahl | eMule Metadata |
| ahm | Acoustic Head Map File |
| ahn | Our Family Tree Data |
| ahp | Autodesk AutoCAD Help Data |
| ahstore | Microsoft SQL Server Property Hash Store |
| ahu | Adobe Photoshop Hue/Saturation Layer |
| ahv | Interfile 3.3 AHV File |
| ai | MOPAC Internal Chemical Modeller Output |
| aia | ANDI/netCDF Chromatography Data |
| aide | AIDE Data |
| aidf | AI BiddingCockpit 8 Specification Sheets |
| aidoc | AI Bietercockpit Document Data |
