| tbpd | Toon Boom Studio for Mac Project Directory |
| tbr | Adobe Photoshop Custom Toolbar Data |
| tbr | Norton Desktop Custom Toolbar |
| tbs | DB/TextWorks Persistent Scripting Information |
| tbs | Intel VTune Performance Monitor Sampling Data |
| tbt | Timbuktu Pro Remote Control Software Format Data |
| tbu | DB/TextWorks Textbase User File |
| tbu | SDL Passolo Translation Bundle |
| tbv | Turbo-BrainVoyager Data |
| tbw | ModelSim Test Bench Waveform |
| tbx | SDL Trados Studio Glossary Data |
| tbx | TermBase eXchange Data |
| tc1 | GeoTide Harmonic Location Constants Data |
| tc2 | GeoTide Vector Stream Prediction Constants Data |
| tcap | HP OpenCall TCAP File |
| tcax | TestComplete Events Project Data |
| tcb | Tokyo Cabinet Database |
| tcc | Tibbo Composite Compressed Data |
| tcdb | CFEngine Database |
| tcdb | Tokyo Cabinet Database |
| tcdock | TestComplete Panel Layout Data |
| tce | STK Two-line Element Sets |
| tcf | Topocad Camber Diagram |
| tcf | TTWin 3 Certificate Licensing Data |
| tcg | Trading Card Game Data |
| tcgb | TCGB Data |
| tcia | TCIA Manifest Data |
| tckdt | TestComplete Keyword Test Data |
| tckdtest | TestComplete Single Keyword Test Data |
| tcl | TextPad Clip Library |
