| Abbreviation | Definition |
|---|---|
| TLC | Compiled Tool Command Language source code (Geoworks Swat) |
| TLD | TeleDisk Disk Image |
| TLF | Text Layout Framework text |
| TLF | Timing Library Format |
| TLP | TimeLine Project |
| TM | EOSAT Landsat Thematic Mapper data file |
| TMF | Tagged Font Metric file (WordPerfect for Win) |
| TMO | Ztg global optimizer default output file (Zortech C++) |
| TMP | Temporary file |
| TMS | TeleMate compiled Script |
| TMS | TeleMate Script |
| TNY | Atari TINY Bitmap graphics |
| TOC | Table Of Contents (index file) |
| TOK | Borland C++ External token |
| TOS | Atari S T Self-extracting file archive file |
| TP | FLAMES template file (Ternion Corporation) |
| TP | Turbo Pascal Configuration file |
| TP | Turbo Profiler Session-state file |
| TP3 | Harvard Graphics 3.0 Template |
| TPB | Downloadable PCL Soft font file backup (HiJaak) |