| Extension | File Description |
| .THMX | Settings Files |
| .THN | Uncommon Files |
| .THNL | Uncommon Files |
| .THO | Uncommon Files |
| .THOR | Uncommon Files |
| .THP | Text Files |
| .THQ | Uncommon Files |
| .THR | Uncommon Files |
| .THREE | Uncommon Files |
| .THRU | Uncommon Files |
| .THS | Uncommon Files |
| .THT | Uncommon Files |
| .THU | Uncommon Files |
| .THUMB | Raster Image Files |
| .THV | Uncommon Files |
| .THW | Uncommon Files |
| .THX | Audio Files |
| .THY | Uncommon Files |
| .THZ | Uncommon Files |
| .TI | Uncommon Files |
| .TI0 | Uncommon Files |
| .TI1 | Uncommon Files |
| .TI2 | Uncommon Files |
| .TI3 | Uncommon Files |
| .TI4 | Uncommon Files |
| .TI5 | Uncommon Files |
| .TI6 | Uncommon Files |
| .TI7 | Uncommon Files |
| .TI8 | Uncommon Files |
| .TI9 | Uncommon Files |
| .TIA | Uncommon Files |
| .TIB | Disk Image Files |
| .TIC | Uncommon Files |
| .TICKET | Uncommon Files |
| .TID | Uncommon Files |
| .TIE | Uncommon Files |
| .TIF | Raster Image Files |
| .TIFENX | Uncommon Files |
| .TIFF | Raster Image Files |
| .TIFFENX | Uncommon Files |
| .TIG | Backup Files |
| .TIH | Uncommon Files |
| .TII | Uncommon Files |
| .TIJ | Uncommon Files |
| .TIK | Uncommon Files |
| .TIL | Uncommon Files |
| .TILE | Uncommon Files |
| .TILES | Uncommon Files |
| .TILESET | Uncommon Files |
| .TIM | Game Files |
| .TIMBALE | Uncommon Files |
| .TIME | Uncommon Files |
| .TIMES | Uncommon Files |
| .TIMPANI | Uncommon Files |
| .TIN | Uncommon Files |
| .TINIES | Uncommon Files |
| .TINIES2 | Uncommon Files |
| .TIO | Uncommon Files |
| .TIP | Misc Files |
| .TIPS | Uncommon Files |
| .TIQ | Uncommon Files |
| .TIR | Uncommon Files |
| .TIS | Uncommon Files |
| .TISV | Uncommon Files |
| .TIT | Uncommon Files |
| .TITLE | Uncommon Files |
| .TIU | Uncommon Files |
| .TIV | Uncommon Files |
| .TIVO | Video Files |
| .TIW | Uncommon Files |
| .TIX | Video Files |
| .TIY | Uncommon Files |
| .TIZ | Uncommon Files |
| .TJ0 | Uncommon Files |
| .TJ1 | Uncommon Files |
| Extension | File Description |
| .TJ2 | Uncommon Files |
| .TJ3 | Uncommon Files |
| .TJ4 | Uncommon Files |
| .TJ5 | Uncommon Files |
| .TJ6 | Uncommon Files |
| .TJ7 | Uncommon Files |
| .TJ8 | Uncommon Files |
| .TJ9 | Uncommon Files |
| .TJA | Uncommon Files |
| .TJB | Uncommon Files |
| .TJC | Uncommon Files |
| .TJD | Uncommon Files |
| .TJE | Uncommon Files |
| .TJF | Uncommon Files |
| .TJG | Uncommon Files |
| .TJH | Uncommon Files |
| .TJI | Uncommon Files |
| .TJJ | Uncommon Files |
| .TJK | Uncommon Files |
| .TJL | Uncommon Files |
| .TJM | Uncommon Files |
| .TJN | Uncommon Files |
| .TJO | Uncommon Files |
| .TJP | Uncommon Files |
| .TJQ | Uncommon Files |
| .TJR | Uncommon Files |
| .TJS | Uncommon Files |
| .TJT | Uncommon Files |
| .TJU | Uncommon Files |
| .TJV | Uncommon Files |
| .TJW | Uncommon Files |
| .TJX | Uncommon Files |
| .TJY | Uncommon Files |
| .TJZ | Uncommon Files |
| .TK | Developer Files |
| .TK0 | Uncommon Files |
| .TK1 | Uncommon Files |
| .TK2 | Uncommon Files |
| .TK3 | Data Files |
| .TK4 | Uncommon Files |
| .TK5 | Uncommon Files |
| .TK6 | Uncommon Files |
| .TK7 | Uncommon Files |
| .TK8 | Uncommon Files |
| .TK9 | Uncommon Files |
| .TKA | Uncommon Files |
| .TKB | Uncommon Files |
| .TKC | Uncommon Files |
| .TKD | Uncommon Files |
| .TKE | Uncommon Files |
| .TKF | Uncommon Files |
| .TKG | Uncommon Files |
| .TKH | Uncommon Files |
| .TKI | Uncommon Files |
| .TKJ | Uncommon Files |
| .TKK | Uncommon Files |
| .TKL | Uncommon Files |
| .TKM | Uncommon Files |
| .TKN | Uncommon Files |
| .TKO | Misc Files |
| .TKP | Uncommon Files |
| .TKQ | Uncommon Files |
| .TKR | Uncommon Files |
| .TKS | Uncommon Files |
| .TKT | Uncommon Files |
| .TKU | Uncommon Files |
| .TKV | Uncommon Files |
| .TKW | Uncommon Files |
| .TKX | Uncommon Files |
| .TKY | Uncommon Files |
| .TKZ | Uncommon Files |
| .TL0 | Uncommon Files |
| .TL1 | Uncommon Files |
| .TL2 | Uncommon Files |
| .TL3 | Uncommon Files |
