| tc | Tellico Collection 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 |
| tcc | TimeCalc Classic Data |
| tcd | Autodesk AutoCAD Civil 3D Template Control Data |
| tcd | Autodesk AutoCAD Template Control Data |
| tcd | Autodesk Land Desktop Template Control Data |
| tcdb | CFEngine Database |
| tcdb | Tokyo Cabinet Database |
| tcdock | TestComplete Panel Layout Data |
| tce | STK Two-line Element Sets |
| tcf | Clarion Topspeed Transaction Control Data |
| tcf | Tajima Embroidery Combined Format Data |
| tcf | Topocad Camber Diagram |
| tcf | TTWin 3 Certificate Licensing Data |
| tcg | Trading Card Game Data |
| tcgb | TCGB Data |
| tch | Complete Works Chart Data |
| tcia | TCIA Manifest Data |
| tckdt | TestComplete Keyword Test Data |
| tckdtest | TestComplete Single Keyword Test Data |
| tcl | TextPad Clip Library |
| tcllc | TestComplete Low-Level Procedures Collection Data |
| tcllp | TestComplete Single Low-Level Procedure Data |
| tclog | TestComplete Log File |
| tcmt | TestComplete Manual Tests Project Data |
