| texture | Diesel Engine Texture Data |
| tf | Xilinx ISE Verilog Test Bench |
| tflite | TensorFlow Lite Model |
| tfp | ProWorx NXT Full Page Data File |
| tfs | Borland Turbo Profiler Statistical Data |
| tgl | IBM MDWorkbench Text Generation Language Script |
| tgml | Tecumseh Group Markup Language Source Code |
| tgn | LaTeX Table Generator Data |
| tgr | Apex Trigger File |
| tgt | Watcom IDE Target File |
| th | Java JRE 1.3 Library |
| thm | ForeUI Theme Data |
| thor | Thor Source Code |
| thtml | TCL HTML Script |
| ti | Timber Language Include File |
| Turing Include File |
| tio | Crestron SIMPL Model Definitions Data |
| tiprogram | TI-BASIC Program |
| tk | Tk Script |
| tkc | WinDev Class Data |
| tke | WinDev Report Archive |
| tkg | WinDev Procedures Archive |
| tkh | WinDev Help Archive |
| tkm | tkMOO-light Script |
| tkn | Liberty BASIC Tokenized Source |
| tkp | WinDev Project Archive |
| tkr | WinDev Results Archive |
| tkw | WinDev Windows Archive |
| tla | Temporal Logic of Actions Data |
| tlb | Visual Basic OLE Type Library |
| tld | Tag Library Descriptor |
| tlf | OpenGL Stonehenge Data |
| tlh | Visual C++ TLH Header |
| tli | Visual C++ TLI Header |
| tlt | TList Data |
| tmac | Troff Macros File |
| tmc | Windows Trace Message Control File |
| tmf | Trace Message Format File |
| Windows Trace Message Format File |
| tmh | Windows Trace Message Header File |
| tmk | Turbo Pascal Tour Data |
| tml | Tapestry Markup Language Document |
| tmml | Tcl Manual Markup Language File |
| tmpl | BlueJ Template File |
| tmx | Translation Memory Exchange Document |
| tnm | Synopsys Synplify Time Names Data |
| toc | Troff Table of Contents Data |
| tok | Borland C++ External Tokens File |
| tom | Tom Source Code |
| tombstone | Android System Tombstone Data |
| toml | TOML Source Code |
| tools | DJGPP Tools Data |
| tox | TouchDesigner Component Data |
| tp1 | SPLat Active Template |
| tph | Turbo Pascal Help |
| tpl | BestAddress HTML Editor Template |
| Nunjucks Template |
| tpm | IBM RSA Transformation Parameters Model |
| tpp | Turbo Pascal Protected Mode Unit |
| tpu | Turbo Pascal Unit |
| tpw | Turbo Pascal Windows Unit |
| tpx | Turbo Pascal 7 Unit |
| tpy | TwinCAT PLC Project Variables |
| tpz | Godot Engine Export Template Archive |
| tql | Tree Query Language Data |
| tr | TCL Trace Output |
| Turbo Debugger Session-state Settings |
| tra | True BASIC Applet |
| µVision Trace Output |
| trb | Amazon Lumberyard Terrain Block Data |
| Turbo STK Application |
| trc | Hitachi Ladder Editor Trace File |
| True BASIC Compiled Program |
| trdf | Apache Jena RDF Thrift Data |
| tres | Godot Engine Text Resource Data |
| trs | TURBU Editor RPG Script |
| WinDev HyperFileSQL Transaction Log |
| tru | True BASIC Source Code |
| trw | Turbo Debugger for Windows Session-state Settings |
| trx | Visual Studio Test Results Data |
