| 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 |
| tcn | Hotword Connection Translator Source |
| Platte Canyon ToolBook Data |
| Techne Model Data |
| tcnetsuite | TestComplete Network Suite Project Data |
| tcnm | TestComplete Name Mapping Project Data |
| tcnunit | TestComplete NUnit Test Data |
| tcodt | TestComplete Object-Driven Testing Project Data |
| tcomp | Tome Editor Component Data |
| tcp | Autodesk AutoCAD Template Control Pointer |
| Esko Automation Engine Legacy Trapping Color Pair |
| tcp2 | TCP/Connect II Data |
| tcpstream | SNORT TCP Stream Data |
| tcs | TOPCALL Voicemail Data |
| Topocad Cross Sections |
| TreeComp Snapshot Data |
| tcscript | TestComplete Script Project Data |
| tct | Topocad Code Table Data |
| tctas | TestComplete Tested Applications Project Data |
| tctbl | TestComplete Table Elements Data |
| tctbls | TestComplete Tables Settings Data |
| tctest | TestComplete Unit Test Data |
| tcu | Tibbo Composite Uncompressed Data |
| tcusrfrm | TestComplete Single User Form Data |
| tcusrfrms | TestComplete User Forms Project Data |
| tcvis | TestComplete Test Visualizer Index |
| tcwat | TestComplete Web Accessibility Data |
| tcwcm | TestComplete Web Comparison Data |
| tcws | TestComplete Web Service Project Data |
| tcwtc | TestComplete WebTesting Collection Data |
| tcx | Garmin Training Center XML Database |
| Tacx Exported Training Data |
| tczip | Tekla Structures Exported Data |
| tczl | Tiny Core Linux Xlib |
| tda | Palm To-Do Archive |
| tda3mt | DivX Author Template |
| tdata | Tome Editor Data |
| tdb | Act! Transaction Database |
| Android Thumbnail Database |
| Autodesk PartMaker Tools Database |
| Complete Works Database |
| Deja Vu Terminology Database |
| eBay Turbo Lister Backup Data |
| Intuit QuickBooks Timer Data |
| SlamDB Database |
| TACT Database |
| tdc | Tableau Data-connection Customization File |
| tddd | Imagine 3D Data Description File |
| tde | Tableau Data Extract |
| tdf | Autodesk AutoCAD Civil 3D Template Control Definition |
| DVD X Copy TDF File |
| Guide Text Definition File |
| MicroSim PCBoard NC Drill Tool Definition |
| Project Pluto Guide Text Definition Data |
| TTDAlter Data |
| Xserve Test Definition Data |
| XTrans Data |
| tdh | Borland Turbo Debugger Help Data |
| tdl | Train Depot Track Designer Data |
| tdn | TreeDBNotes Database |
| tdo | Xilinx Text Design Output |
| tdp | Serif DrawPlus Thumbnail |
| tdr | Keysight PLTS TDR Calibration Data |
| Medlin Payroll Software Tax Deposit Record |
| Physical Layer Test System Calibration Data |
| TINA Diagram Results |
| tds | Adobe LiveCyle Designer Template |
| Tableau Data Source |
| tdsp | Windows Media Player TDSP Data |
| tdsx | Tableau Packaged Data Source |
| tdt | PLINK Transmission Disequilibrium Test Report |
| THOR Datatree File |
| tdt1 | AACS Thumbnail Data File |
| tdt2 | AACS Thumbnail Data File |
