| agw | Aspen Graphics Window 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 |
| aia | ANDI/netCDF Chromatography Data |
| aide | AIDE Data |
| aidf | AI BiddingCockpit 8 Specification Sheets |
| aidoc | AI Bietercockpit Document Data |
| aidocdef | AI Bietercockpit Document Definition Data |
| aif | SmartWare Executable Program |
| aiform | AI Bietercockpit Form Data |
| aii | Telerik Test Studio Test Definitions File |
| aiilist | Telerik Test Studio Test List |
| aij | Oracle Database After-Image Journal |
| ail | AutoImager List |
| aim | AIMMS ASCII Model File |
| aiml | Artificial Intelligence Markup Language |
| aipc | Android Inter-Process Communication Data |
| aiqb | Intel IQ-Studio Tuning Data |
| airc | NDARC Aircraft Model Data |
| airi | Adobe AIR Intermediate Data |
| ait | Digital Video Broadcasting AIT Data |
