| time | Light Time |
| timeline | Timeline Data |
| timg | Playground OSS Image Data |
| tin | Bentley GEOPAK Environmental Modeling Systems Data |
| Carlson 2016 Triangulated Irregular Network Data |
| WMS Triangulated Irregular Networks Data |
| WRAP TABLES Input Data |
| tinf | Microsoft Windows Theme Info |
| tiny | Gnome Desktop Tiny Data |
| tiq | Tektronics RSA306 TIQ Data |
| tis | Lucene Term Infos |
| Tru-Designer Captured Device Settings Data |
| TruKnox Tru-i Suite Data |
| tisv | WabbitDS Save File |
| tit | CXTerm Text Input Table |
| Novapoint Horizontal Alignment Data |
| tjexp | The Journal Exported Data |
| tjf | VAXTPU Backup Data |
| tji | TaskJuggler Include File |
| tjl | HP OpenVMS ACL Editor Journal Data |
| tjm | Crazy Talk Model |
| tjp | TaskJuggler Project File |
| tjvdb | The Journal Volume Database |
| tjxml | The Journal Export Data |
| tk | TeKton3D Project |
| tk1 | Wintec WBT-201 TK1 Tracklog |
| tk2 | Wintec WBT-201 TK2 Tracklog |
| tk3 | Wintec WBT-201 TK3 Tracklog |
| tk4 | Wintec WSG-1000 Mark Database |
| tk5 | eXtendable Wad Editor TK5 Data |
| tka | Genie 2000 Measurements Data |
| tkb | TicketBench Data |
| tkc | MetaTrader 5 Tick Data |
| tkd | Wikit TKD Database |
| tkfl | TKLinks Saver Favorite Links |
| tki | Tkined Data |
| tkined | Tkined Configuration Data |
| tkr | eSignal Ticker Data |
| tks | NI Traktor Pro MIDI Map |
| tkt | TK Solver Data |
| tkw | TK Solver Data File |
| tkx | TK Solver Package |
| tl5 | Timeliner 5 Data |
| tlb | HP OpenVMS Text Library |
| Portfolio Automation Interface Data |
| TrialDirector Toolbar Data |
| VAX Text Library |
| tlbackup | True Launch Bar Settings Backup |
| tlbbackup | True Launch Bar Settings Backup |
| tlbplugin | True Launch Bar Plugin |
| tlc | TINA Logic Converter Data |
| Topocad Layer Collection Data |
| tld | PTC Creo Thermal Temperature Load Data |
| TINA Library Descriptor |
| Trellix Document Design Data |
| tle | dpsVelocity Timeline Data |
| STK Two-line Element Sets |
| tlf | Dolphin PartMaster Tool Data |
| QUANTA Template File |
| Timing Library Format File |
| tlic | ClickOnce Trust License Data |
| tlist | Geomview Transformation Matrices Data |
| tll | LG TV Link-Loader File |
| tlm | Spektrum DX8 Telemetry Log |
| Timeline Maker Timeline Data |
| tln | HyperLynx LineSim Schematic |
| tlo | SPSS Table Look File |
| tlog | ArduCopter Telemetry Log |
| Oracle Database Transaction Log |
| tlr | Tableau Offline License Registration Data |
| tlst | GibbsCAM Tool List Data |
| tlsv | Topcon TopSURV Database |
| tlt | AVerMedia AVerTV Go Teletext Data |
| Topocad Line Table Data |
| Trellix Web Design Template |
| tlv | Transaction-Level Verilog Data |
| TruLASER View Geometry Data |
| tlx | Cardbox User Spelling Dictionary |
| Catalyst Translation Toolkit Data |
| CuteSITE Builder Website Data |
