| aer | Adobe Atmosphere World |
| aero | STK Aerodynamics File |
| aes | Adobe After Effects Stabilizer Settings Data |
| aes | ooVoo Log File |
| aet | Adobe After Effects Template |
| aetx | Adobe After Effects XML Template |
| aeu | Autoroute Express Europe Route Data |
| aev | Notepad++ Data |
| aexpk | PGP Armored Extracted Public Key Data |
| af | Serif 3DPlus Model |
| af0 | PocketBook Bookmark Data |
| af4 | Audifit v4 Data |
| afb | Alphacam Flame VB Macro |
| afbrushes | Affinity Photo Brushes Data |
| afc | Active-HDL Drawing |
| afc | ArisFlow Flowchart Data |
| afd | ArisFlow Flowchart Diagram |
| afe | Avid File Exchange |
| aff | FRAMES Air Flux File |
| aff | Mozilla Firefox Dictionary Data |
| aff | NVU AFF Data |
| aff | WRAP SIMD Annual Flood Frequency Data |
| afg | Tablet Assembly Data |
| afm | Acoustic Filter Map File |
| afm | Advanced Forensics Format Metadata |
| afm | Alphacam Flame Param Macro |
| afm | DESQview AFM Data |
| afm | HP NewWave Cardfile Application Data |
| afmacro | Affinity Photo Macro Data |
| afmacros | Affinity Photo Brushes Data |
