| Extension | File Description |
| .AU? | Developer Files |
| .AUA | Uncommon Files |
| .AUB | Uncommon Files |
| .AUC | Uncommon Files |
| .AUCTIONS | Uncommon Files |
| .AUD | Audio Files |
| .AUDIO | Uncommon Files |
| .AUE | Uncommon Files |
| .AUF | Uncommon Files |
| .AUG | Uncommon Files |
| .AUH | Uncommon Files |
| .AUI | Uncommon Files |
| .AUJ | Uncommon Files |
| .AUK | Uncommon Files |
| .AUL | Uncommon Files |
| .AUM | Uncommon Files |
| .AUN | Uncommon Files |
| .AUO | Uncommon Files |
| .AUP | Audio Files |
| .AUPD | Uncommon Files |
| .AUQ | Uncommon Files |
| .AUR | Uncommon Files |
| .AUS | Uncommon Files |
| .AUT | Developer Files |
| .AUTOCONF | Uncommon Files |
| .AUTOCOPY | Uncommon Files |
| .AUTOLAUNCH | Uncommon Files |
| .AUTOREG | Uncommon Files |
| .AUU | Uncommon Files |
| .AUV | Uncommon Files |
| .AUW | Uncommon Files |
| .AUX | GIS Files |
| .AUY | Uncommon Files |
| .AUZ | Uncommon Files |
| .AV | Uncommon Files |
| .AV0 | Uncommon Files |
| .AV1 | Uncommon Files |
| .AV2 | Uncommon Files |
| .AV3 | Uncommon Files |
| .AV4 | Uncommon Files |
| .AV5 | Uncommon Files |
| .AV6 | Uncommon Files |
| .AV7 | Uncommon Files |
| .AV8 | Uncommon Files |
| .AV9 | Uncommon Files |
| .AVA | Uncommon Files |
| .AVB | Video Files |
| .AVC | Data Files |
| .AVD | Video Files |
| .AVE | Settings Files |
| .AVF | Uncommon Files |
| .AVG | Uncommon Files |
| .AVH | Uncommon Files |
| .AVI | Video Files |
| .AVJ | Uncommon Files |
| .AVK | Uncommon Files |
| .AVL | GIS Files |
| .AVM | Uncommon Files |
| .AVN | Uncommon Files |
| .AVO | Uncommon Files |
| .AVP | Video Files |
| .AVQ | Uncommon Files |
| .AVR | Audio Files |
| .AVS | Video Files |
| .AVT | Uncommon Files |
| .AVU | Uncommon Files |
| .AVV | Uncommon Files |
| .AVW | Uncommon Files |
| .AVX | Plugin Files |
| .AVY | Uncommon Files |
| .AVZ | Uncommon Files |
| .AW | Data Files |
| .AW0 | Uncommon Files |
| .AW1 | Uncommon Files |
| .AW2 | Uncommon Files |
| Extension | File Description |
| .AW3 | Uncommon Files |
| .AW4 | Uncommon Files |
| .AW5 | Uncommon Files |
| .AW6 | Uncommon Files |
| .AW7 | Uncommon Files |
| .AW8 | Uncommon Files |
| .AW9 | Uncommon Files |
| .AWA | Uncommon Files |
| .AWARE | Uncommon Files |
| .AWB | Audio Files |
| .AWBS | Uncommon Files |
| .AWC | Uncommon Files |
| .AWD | Raster Image Files |
| .AWE | Uncommon Files |
| .AWF | Uncommon Files |
| .AWG | Uncommon Files |
| .AWGS | Uncommon Files |
| .AWGS1 | Uncommon Files |
| .AWGS2 | Uncommon Files |
| .AWH | Uncommon Files |
| .AWI | Uncommon Files |
| .AWJ | Uncommon Files |
| .AWK | Developer Files |
| .AWL | Uncommon Files |
| .AWLIVE | Uncommon Files |
| .AWM | Web Files |
| .AWN | Uncommon Files |
| .AWO | Uncommon Files |
| .AWP | Text Files |
| .AWPSTRINGS | Uncommon Files |
| .AWQ | Uncommon Files |
| .AWR | Uncommon Files |
| .AWS | Settings Files |
| .AWSHORTCUT | Uncommon Files |
| .AWT | Text Files |
| .AWU | Uncommon Files |
| .AWV | Uncommon Files |
| .AWW | Text Files |
| .AWX | Uncommon Files |
| .AWY | Uncommon Files |
| .AWZ | Uncommon Files |
| .AWZIP | Uncommon Files |
| .AW_ | Uncommon Files |
| .AX | Plugin Files |
| .AX0 | Uncommon Files |
| .AX1 | Uncommon Files |
| .AX2 | Uncommon Files |
| .AX3 | Uncommon Files |
| .AX4 | Uncommon Files |
| .AX5 | Uncommon Files |
| .AX6 | Uncommon Files |
| .AX7 | Uncommon Files |
| .AX8 | Uncommon Files |
| .AX9 | Uncommon Files |
| .AXA | Uncommon Files |
| .AXB | Uncommon Files |
| .AXC | Uncommon Files |
| .AXD | Web Files |
| .AXE | GIS Files |
| .AXF | Uncommon Files |
| .AXG | Uncommon Files |
| .AXH | Uncommon Files |
| .AXI | Uncommon Files |
| .AXJ | Uncommon Files |
| .AXK | Uncommon Files |
| .AXL | Uncommon Files |
| .AXLS | Uncommon Files |
| .AXM | Video Files |
| .AXN | Uncommon Files |
| .AXO | Uncommon Files |
| .AXP | Settings Files |
| .AXQ | Uncommon Files |
| .AXR | Uncommon Files |
| .AXS | Uncommon Files |
| .AXT | Settings Files |
