| 201. | .avi | Movie or sound (Audio Video Interleave file) |
| 202. | .avl | Device library file ◊ legend template file (ODB format) (ArcView) |
| 203. | .avp | palette file (ODB format) (ArcView) |
| 204. | .avr | Sound (Audio Visual Research file format) |
| 205. | .avs | Application Visualization System (animation) ◊ Bitmap graphics (AVS X image file) |
| 206. | .avt | Avatar-coding files (A3E) |
| 207. | .avx | ArcView extension file (ODB format) (ArcView) |
| 208. | .aw | Document (Applix Words) ◊ Text document (HP AdvanceWrite) |
| 209. | .awa | Animation Works Accelerated movie (Animation Works) |
| 210. | .awd | Fax image (FaxView - Microsoft Fax At Work) |
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