| ahv | Interfile 3.3 AHV File |
| ai | Advantage Data Dictionary Index |
| ai | MOPAC Internal Chemical Modeller Output |
| aia | Adobe Illustrator Action Data |
| aia | ANDI/netCDF Chromatography Data |
| aid | ACDSee Classic Thumbnail Data |
| aide | AIDE Data |
| aidf | AI BiddingCockpit 8 Specification Sheets |
| aidoc | AI Bietercockpit Document Data |
| aidocdef | AI Bietercockpit Document Definition Data |
| aif | Intuit QuickBooks Accountants Review Copy Data |
| aif | OS/2 Warp Application Information |
| aif | SmartWare Executable Program |
| aif | Symbian OS Application Information |
| 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 |
| aim | AOL Instant Messenger Launcher |
| 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 |
| aiu | MailWasher Update |
| aiv | AIVault Data |
| ajb | Alphacam Water Jet VB Macro |
