| trix | RDF Triples in XML |
| trj | GROMACS Trajectory of a Simulation Data |
| trk | Concordance Transaction Tracking Data |
| trk | Garmin GPS PCX5 Tracklog |
| trk | LP Ripper Track Analysis Data |
| trk | MakeMusic Finale Track/Staff Mapping File |
| trk | STAR-CD v4 Droplet Track Data |
| trk | Train Dispatcher Data |
| trl | Holux GM-101 Tracklog |
| trl | Topocad Roadlines Data |
| trll | Topocad Length Table Data |
| trm | eSignal Trade Manager Data |
| trm | Oracle Trace Map Data |
| trm8 | Avantes Avasoft v8 Transmittance Mode Data |
| trn | CFX Transient File |
| trn | Corel Quattro Pro Translation Support Data |
| trn | Medlin Payroll Software Current Year Transactions Data |
| trn | MegaHAL Training Data |
| trn | Microsoft SQL Server Transaction Log |
| trn | Oracle Documaker Transaction Data |
| trn | PTC Creo Turning Parameter Data |
| trn | STN Express Transcript Text |
| trn | TextBridge Pro Trainging Data |
| tro | IBM Voice Type Data |
| trp | EPLRS Network Activity Logging Trap |
| trp | MotionTracking Track Search Parameters Data |
| trp | Topocad Road Profile |
| trp | TrimeTool TRP Output |
| trp | TripMaker Document |
| trr | GROMACS Trajectory File |
