| trn | Oracle Documaker Transaction Data |
| trn | PTC Creo Turning Parameter Data |
| tro | IBM Voice Type Data |
| trp | MotionTracking Track Search Parameters Data |
| trp | Topocad Road Profile |
| trp | TrimeTool TRP Output |
| trp | TripMaker Document |
| trr | GROMACS Trajectory File |
| trs | Table Retrieval System Document |
| trs | TrIDNet Serialized Definitions Package |
| trs | WinTrack Railroad Track Text Data |
| trt | Team Sports Scheduling System Report Template |
| truck | Rigs of Rods Truck Description File |
| trv | Topocad Traverse Document |
| trxml | Textkernel Sourcebox XML Data |
| try | CIBSE Test Reference Year Data |
| trz | Norton Antivirus Rapid Release Definition Update |
| ts1 | Green Kenue Time Series Data |
| ts2 | Green Kenue Time Series Data |
| ts2 | Time Stamp Project-wide Information |
| ts3 | Green Kenue Time Series Data |
| ts3_style | TeamSpeak 3 Style Data |
| ts4 | Green Kenue Time Series Data |
| ts5 | Green Kenue Time Series Data |
| tsa | Trial Sequential Analysis Data |
| tsc | Tekla Structures Exported Shape |
| tsc | TINA v6 Schematic Data |
| tscdf | Camtasia Device Frame Data |
| tscpro | Camtasia Device Frame Data |
| tsd | Tamino Schema Definition Data |
