| tlx | Sentry Spelling Checker Engine Dictionary |
| Technics SX-KN6000 Text Lyrics Data |
| Trellix Web Design Data |
| tly | Adobe Photoshop Elements Backup Catalog |
| tlz | LZMA Compressed TAR Archive |
| tlzma | LZMA Compressed TAR Archive |
| tm | Catalyst Translation Memory Data |
| Landsat Thematic Mapper Data |
| PCCharge Transaction Data |
| tm1 | TimeWise Data |
| tma | DCI TradeManager Catalog Archive |
| tmb | 602PC Suite Thumbnail Data |
| Movie Magic Screenwriter Timed Backup |
| Panasonic HD Camcorder Extra Data |
| TMXEditor User Data |
| tmblr | TumblRipper Data |
| tmbundle | TextMate Bundle |
| tmcommand | TextMate Command Data |
| tmcpr | Minecraft Replay Mod Replay Data |
| tmd | MySQL Temporary Database |
| PlayStation Game Model Data |
| TrueMap Surface Data |
| World Machine Terrain Data |
| tmdb | TaskMerlin Database |
| tme | Bryce Time Data |
| tmesh | Cyberware 3D Scanner Data |
| tmg | The Master Genealogist Data |
| tmj | Thrustmaster Software Joystick Data |
| tml | Advanced ID Creator Template |
| AIRO Timeline Data |
| Bentley InRoads Typical Section Library Data |
| DB/TextWorks Thesaurus Maintenance Lock |
| WZ Editor Macro Data |
| tmlanguage | TextMate Language Grammar Data |
| tmm | Thrustmaster Software Macro Data |
| TimeMap Metadata |
| tmn | Tmin Input File |
| tmo | Zortech C++ Global Optimizer Output |
| tmp | AquaCrop Air Temperature Data |
| AZZ Cardfile Temporary Data |
| Finale Temporary Data |
| Nero WaveEditor Peak Data |
| SafeDisc Temporary Data |
| SWAT Temperature Input Data |
| tmpl | Swish-e Template Data |
| Xfire User Interface Template |
| tmplg | Send to TimeMap Plug-in |
| tmplx | Microsoft Windows Starter Group Policy Object XML |
| tmprtf | LexisNexis TimeMap Portable Format Data |
| tmq | TestMaster Questions Data |
| tmr | Free Countdown Timer Backup File |
| tmreg | TaskMerlin Registration Data |
| tms | Tableau Map Source |
| WRAP Tables Message Data |
| tmtheme | TextMate Theme |
| tmv | TimeMap Visual Data |
| tmw | Translation Memory Data |
| Twinmotion Data |
| tmx | Arbortext Editor Custom Input Data |
| Tiled Tile Map XML |
| tmy | Typical Meteorological Year Data |
| tmz | Medigraph Compressed Database |
| tmzip | Theme Manager Zip Package |
| tna | Topocad Net Adjustment |
| tnd | CAS-Hydro Tree-node Definition File |
| TranEd v2 File |
| tnef | Transport Neutral Encapsulation Format |
| tnf | Transport Neutral Encapsulation Format |
| tnfo | SpyBot Search and Destroy TNFO Data |
| tni | TexNet32 Database Index |
| tnj | CapturePost TimeStone Neo Job Data |
| tnk | Nimbus 7 SAMS Data |
| tnt | TNT Data File |
| TurnTool 3D Model |
| tnx | PageTech PCLTool Text Extraction File |
| tob | Zemax Object Data |
| toc | Eudora Addressbook TOC |
| tocf | Qualcomm Eudora for Mac TOC Data |
| todo | Simple Project ToDo Database |
| tof | Mr. Photo Thumbnail |
