| amr | BrainVoyager QX Anatomical Slices |
| amsorm | OnLine Ringman Auction Client |
| amt | Alphacam 2D/3D Mill Tool Data |
| amt | ArtMoney Table |
| amu | Sony PictureGear Studio Photo Album |
| amy | Actual Meteorological Year Data |
| amz | Amazon MP3 Downloader Data |
| an2 | Cisco MXE AN2 File |
| an3 | QuickWave 3D Radiation Pattern |
| ana | Analysis for Windows Structure |
| anc | Alphacam NC Program |
| anf | ANSYS Neutral File |
| ang | CYANA Torsion Angle File |
| anki | Anki Data |
| anl | Alphacam Nest List |
| anme | Anime Studio Document |
| ann | Windows Help Annotations |
| annot | FreeSurfer Annotation |
| ano | Vaa3D ANO Data |
| anp | Annotis Mail Data |
| ans | HotDocs Answer |
| ansym | Adobe Edge Animate Library |
| ant | Xilinx ISE ANT File |
| ant | Radio Mobile Antenna Definition |
| anw | Anno Wallet Backup File |
| anx | HotDocs Answer |
| any | AnyRail Layout Plan |
| aoa | Adaptive Optics AOA Data |
| aoc | IBM Tivoli Network Manager AOC File |
| aod | Microsoft Dynamics AX Application Object Data |
