| Extension | File Description |
| .TRQ | Uncommon Files |
| .TRR | Uncommon Files |
| .TRS | Data Files |
| .TRT | Uncommon Files |
| .TRU | Uncommon Files |
| .TRUETYPE | Uncommon Files |
| .TRUMPET | Uncommon Files |
| .TRV | Uncommon Files |
| .TRW | Uncommon Files |
| .TRX | Developer Files |
| .TRY | Uncommon Files |
| .TRZ | Uncommon Files |
| .TS | Data Files |
| .TS0 | Uncommon Files |
| .TS07 | Uncommon Files |
| .TS1 | Uncommon Files |
| .TS2 | Uncommon Files |
| .TS3 | Uncommon Files |
| .TS4 | Uncommon Files |
| .TS5 | Uncommon Files |
| .TS6 | Uncommon Files |
| .TS7 | Uncommon Files |
| .TS8 | Uncommon Files |
| .TS9 | Uncommon Files |
| .TSA | Uncommon Files |
| .TSB | Uncommon Files |
| .TSC | Uncommon Files |
| .TSCE | Uncommon Files |
| .TSD | Uncommon Files |
| .TSE | Uncommon Files |
| .TSF | CAD Files |
| .TSG | Uncommon Files |
| .TSH | Uncommon Files |
| .TSI | Uncommon Files |
| .TSIG | Uncommon Files |
| .TSJ | Uncommon Files |
| .TSK | Settings Files |
| .TSL | Uncommon Files |
| .TSM | Settings Files |
| .TSN | Uncommon Files |
| .TSO | Uncommon Files |
| .TSP | Audio Files |
| .TSQ | Uncommon Files |
| .TSR | Uncommon Files |
| .TSS | Uncommon Files |
| .TST | Data Files |
| .TSTREAM | Misc Files |
| .TSU | Uncommon Files |
| .TSV | Data Files |
| .TSW | Uncommon Files |
| .TSX | Uncommon Files |
| .TSY | Uncommon Files |
| .TSZ | Settings Files |
| .TT | Developer Files |
| .TT0 | Uncommon Files |
| .TT1 | Uncommon Files |
| .TT2 | Uncommon Files |
| .TT3 | Uncommon Files |
| .TT4 | Uncommon Files |
| .TT5 | Uncommon Files |
| .TT6 | Uncommon Files |
| .TT7 | Uncommon Files |
| .TT8 | Uncommon Files |
| .TT9 | Uncommon Files |
| .TTA | Audio Files |
| .TTB | Uncommon Files |
| .TTC | Font Files |
| .TTCTMR | Uncommon Files |
| .TTD | Uncommon Files |
| .TTE | Uncommon Files |
| .TTF | Font Files |
| .TTG | Uncommon Files |
| .TTH | Uncommon Files |
| .TTI | Uncommon Files |
| .TTJ | Uncommon Files |
| Extension | File Description |
| .TTK | Data Files |
| .TTKGP | Uncommon Files |
| .TTL | Uncommon Files |
| .TTM | Game Files |
| .TTN | Uncommon Files |
| .TTO | Uncommon Files |
| .TTP | Uncommon Files |
| .TTQ | Uncommon Files |
| .TTR | Uncommon Files |
| .TTS | Uncommon Files |
| .TTT | Uncommon Files |
| .TTU | Uncommon Files |
| .TTV | Uncommon Files |
| .TTW | Uncommon Files |
| .TTX | Misc Files |
| .TTY | Uncommon Files |
| .TTZ | Uncommon Files |
| .TT_ | Uncommon Files |
| .TU | Developer Files |
| .TU0 | Uncommon Files |
| .TU1 | Uncommon Files |
| .TU2 | Uncommon Files |
| .TU3 | Uncommon Files |
| .TU4 | Uncommon Files |
| .TU5 | Uncommon Files |
| .TU6 | Uncommon Files |
| .TU7 | Uncommon Files |
| .TU8 | Uncommon Files |
| .TU9 | Uncommon Files |
| .TUA | Uncommon Files |
| .TUB | Raster Image Files |
| .TUC | Uncommon Files |
| .TUD | Uncommon Files |
| .TUDUMO | Uncommon Files |
| .TUE | Uncommon Files |
| .TUF | Uncommon Files |
| .TUG | Uncommon Files |
| .TUH | Uncommon Files |
| .TUI | Uncommon Files |
| .TUJ | Uncommon Files |
| .TUK | Uncommon Files |
| .TUL | Uncommon Files |
| .TUM | Uncommon Files |
| .TUN | Audio Files |
| .TUNE | Uncommon Files |
| .TUNEAO | Uncommon Files |
| .TUO | Uncommon Files |
| .TUP | Uncommon Files |
| .TUQ | Uncommon Files |
| .TUR | Developer Files |
| .TURBOC3 | Uncommon Files |
| .TURCA | Uncommon Files |
| .TUS | Uncommon Files |
| .TUT | Game Files |
| .TUTORIAL | Uncommon Files |
| .TUU | Uncommon Files |
| .TUV | Uncommon Files |
| .TUW | Uncommon Files |
| .TUX | Uncommon Files |
| .TUY | Uncommon Files |
| .TUZ | Uncommon Files |
| .TV | Uncommon Files |
| .TV0 | Uncommon Files |
| .TV1 | Uncommon Files |
| .TV2 | Uncommon Files |
| .TV3 | Uncommon Files |
| .TV4 | Uncommon Files |
| .TV5 | Uncommon Files |
| .TV6 | Uncommon Files |
| .TV7 | Uncommon Files |
| .TV8 | Uncommon Files |
| .TV9 | Uncommon Files |
| .TVA | Uncommon Files |
| .TVB | Uncommon Files |
| .TVC | Uncommon Files |
