| tdump | JIRA Thread Dump |
| tdv | NI Diadem Layout |
| tdx | NI Diadem TDX Data |
| te | Textease Database CT Single-user Database |
| te1 | UltraEdit Template |
| te3 | WinTrack Object File |
| tea | TEA Encrypted Data |
| teacher | SMART Response Teacher Database |
| tec | Android TEC Thumbnail Data |
| SigmaNEST Cutting Table Data |
| Tanner EDA L-edit Layout Data |
| TECkit Compiled Mapping Table |
| TECO Macro Data |
| Tecplot ASCII Data |
| ted | DViCO TViX Log |
| Topocad Export Data |
| tei | Text Encoding and Interchange Data |
| TrackEye Image Sequence Data |
| tek | ASITIC Technology Data |
| Tektronix HEX Data |
| tem | Badge Designer 2000 Template |
| Borland C++ Turbo Editor Macro Script |
| RPG Toolkit Character Data |
| temx | Cemetery Registry Database |
| teo | TruTops Tube Data |
| teq | Saia S-Web Editor PCD Data |
| TINA Equation File |
| ter | Daylon Leveller Heightfield Data |
| Terragen Terrain File |
| tera | Locktera Encrypted Data |
| term | Apple Terminal Data |
| Julius Term Data |
| terrain | Terragen Terrain File |
| terrn | Rigs of Rods Terrain Data |
| terrn2 | Rigs of Rods Terrain Data |
| tes | TECO Macro Data |
| tet | Textease Database CT Single-user Database Template |
| tew | Bentley InRoads Text Export Wizard Data |
| tex | Concordance Text Data |
| Leadwerks Texture Data |
| Mackichan Scientific Notebook Data |
| Paint Shop Pro Texture Data |
| tex0 | Nintendo Wii Texture Data |
| texb | Playground OSS Texture Data |
| texport | Tome Editor Export Template Data |
| texter | Texter Snippet Data |
| textfactory | BBEdit Text Factory Data |
| texts | Ribbons Texts Data |
| tf | Autodesk Inventor Transcript Data |
| Terraform Module |
| TinyFugue Script |
| Topocad Transformation Data |
| tf10 | IRIG 106 Data Transfer Data |
| tfa | Borland Turbo Profiler Area Data |
| TreeSoft CashFlow Analysis Data |
| tfam | PLINK Individual Information File |
| tfd | Tape Format Requirements Document |
| tfh | Borland Turbo Profiler Help Data |
| tfi | Sharing Transaction Fraud Data |
| Topocad Transformation Information Data |
| tfields | Tome Editor Field Definition Data |
| tfil | World of Warcraft Software Update |
| tfl | ALKFLOW Total Flow Data |
| DB-MAIN Transformation Assistant Library Data |
| Tableau Flow Data |
| Tific Client Data |
| Trimble Field Link Data |
| tflow | MTFLOW Data |
| tfr | 4D Database Windows Formula Document |
| tfrm | 4D Database Mac OS X Formula Document |
| tfs | DB-MAIN Transformation Assistant Script Data |
| tfv | YETI Vegetation Plot Database Export File |
| tfx | Avid Pro Tools Eleven Rack Presets |
| Traffix Data |
| tfy | Terrafy Module |
| tfz | FBS Vehicle Database |
| tg2 | tg2htm Saved Metadata |
| tg3 | TexGen 3 Geometry Data |
| tgc | Terragen Clip File |
| tgd | Digital Tachograph Binary Data |
