| Abbreviation | Definition |
|---|---|
| T | Tads source |
| T | Tape Archive without compression (tar) |
| T | Tester symbol table (ReaGeniX code generator) |
| T | Unformatted manual page (Roff/nroff/troff/groff) |
| T44 | dBASE IV Temporary file for Sort or Index |
| T64 | Commodore 64 emulator tape file |
| T65 | PageMaker Template |
| TAAC | Sun TAAC Image File Format Bitmap graphics |
| TAB | Color lookup TABle (CMYK image) |
| TAG | DataFlex Query Tag name |
| TAH | Turbo Assembler Help file |
| TAL | TypeAlign Text illustration |
| TALK | Text to speech |
| TAP | Tape file |
| TAR | TAR Compressed file archive |
| TAR.GZ | Gzipped tar file extension |
| TARGA | Bitmap graphics (Truevision Targa format) |
| TAZ | Compressed file.tar.Z archive |
| TB1 | Borland Turbo C Font file |
| TB2 | Borland Turbo C Font file |