.??_  Files ending in "_" are often compressed install files of the same
          name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.)
  .T    Tads Source File
        Turing Programming Language File
        TAR Tape Archive Without Compression
  .T_1  Polytext Ma'archot Meida Co. S"TaM ("Sifriyah Toranit M'muchshevet" - Computerized Torah Library)
  .T??  Ingres Table/Index File (?? = Hex 00 to FF)
        RAR Compressed File (?? can be 01 to 99 after .S99)
  .T1   Male MRI  [XnView]
        EARS Component File (EARS = UK Liberal Democrats Election Agents Record System) [Filename starts with E]
  .T2   Male MRI  [XnView]
  .T2K  Teach2000 Document
  .T2T  Sonata CAD Modelling File
  .T64  C64S Emulator Program
  .T98  Kiplinger Tax Cut File (1998 Tax Year)
  .T99  Kiplinger Tax Cut File (1999 Tax Year)
        (Note: Kiplinger Tax Cut State Return Files are of the form .T??
               where ?? is the two-character state designation.)
  .TAAC  Sun TAAC File  [XnView]
  .TAB  Guitar Tablature File [On-line Guitar Archive]
        MapInfo Table
        Diabetes Mentor File
  .TAF  Birdstep Technologies RDM Database (may be embedded in other software)
  .TAG  Dataflex Query Tag Name
  .TARGA  Truevision Targa Bitmap  [XnView]
  .TAH  Turbo Assembler Help File
  .TAI  INMOS Transputer Development System Occam Analyse Info
  .TAL  Adobe TypeAlign Text Illustration File
        Typed Assembly Language File
  .TAM  Tame Program Settings
  .TAO  IsoBuster File
  .TAR  Compressed Archive File
  .TAX  Turbotax File
  .TAZ  Compressed File (short for .tar.z)
  .TB1  Turbo C Font
  .TB2  Turbo C Font
  .TBB  The Bat! E-mail Hives
  .TBC  IronCAD Tool Bar Customization
        Inovate Tool Bar Customization
  .TBF  Imavox TurboFax Faxs
        Trellian Button Factory File
  .TBG  TeamBG File (modify Infinity Engine games)
  .TBI  The Bat! Hive Index
  .TBK  Memo Backup (database programs)
        Asymetrix Toolbook
        The Bat! Backup Hives
  .TBL  Adobe Pagemaker Import Mapping Table
        OS/2 Table of Values
  .TBP  TAS Books Accounts
  .TBR  SoftQuad XMetaL Toolbar/Menu Configuration
  .TBX  Project Scheduler Table
  .TC   Borland Configurations File
  .TCF  Theme Park World Game File
  .TCH  Borland Help File
  .TCI  INMOS Transputer Development System Occam Configuration Info
  .TCL  TCL/TK Language Script
        TextPad Clip Library
        SLIDE: Scene Language for Interactive Dynamic Environments File
  .TCM  INMOS Transputer Development System Occam Comment Text File
  .TCT  Championship Manager Game File
        TurboCAD Template
  .TCW  TurboCAD Drawing
  .TCX  TurboCAD Drawing as Text
  .TD   Turbo Debugger Configuration File
  .TD2  Turbo Debugger Configuration File
  .TD4  RollerCoaster Tycoon Track Design
        ThumbsPlus Version 4.x+ Graphics Database
  .TDA  Palm Date Book File
  .TDB  Thumbs Plus Database
  .TDF  Trace Definition File
        TheDraw Font
        Typeface Definition File (for fonts)
  .TDH  Turbo Debugger Help File
  .TDI  Explore (TDI) & Maya  [XnView]
  .TDIM  Digital F/X  [XnView]
  .TDK  Turbo Debugger Keyboard Record
  .TDO  Compressed File
  .TDP  Serif DrawPlus Thumbnail
  .TDS  Turbo Debugger Symbol Table
  .TDT  Daylight Fingerprint Data File
        ASCII Data File in CSV Format (various)
  .TDW  Turbo Debugger Configuration File
  .TDY  TODAY or BuildPro Application File
  .TE   Textease File
  .TE2  Conquest of the New World
  .TEA  Tea Template Source File
  .TED  Tribes 2 Game File
  .TEE  TeeChart Office Graphic
  .TEF  Relisys Tefax Fax
        TablEdit (creating, editing, printing and listening to tablature)
  .TEL  Telnet Host File
  .TEM  Icon Author Template
        Turbo Editor Macro Language
        Badge Designer 2000 File
  .TEMP  Audiogalaxy Downloading Music File (file renamed when download complete)
  .TER  TerraGen Landscape File
        Daylon Leveller Heightfield Data
  .TET  Textease Template
  .TEX  TeX
        LaTeX File
        Mackichan Scientific Notebook File
        PaintShop Pro Texture  [XnView]
        Texture File (various) [usually a renamed .BMP file and may be in special directory]
        Idealist Datasheet
        Concordance Full Text Database File
  .TEXT  ASCII Text File (use any editor to open)
  .TF   Turbo Profiler Configuration File
  .TFA  Turbo Profiler Area File
  .TFC  Tobi's Floppy Cataloguer Catalog
  .TFH  Turbo Profiler Help File
  .TFM  Tagged Font Metric
        TeX Font Metric File
        Toplevel Form File
  .TFR  Star Wars - Tie Fighter Game-Pilot File
        IBM Client Access File Transfer
        4D Database Windows Formula Document
  .TFS  Turbo Profiler Statistic
  .TFW  Digital Raster Graphic World
  .TFX  Traffix Traffic Analysis Software
  .TG1  On Target Project File
  .TG4  CCITT Group 4 Fax  [XnView]
  .TGA  Truevision Targa Graphic  [XnView] [IrfanView]
        (Used by some game programs -- sometimes called texture files)
  .TGD  Nimbus 7 SAMS Data File (gridded temperature data)
  .TGH  Tiliagraph File (Stratigraphic Diagram Software)
  .TGH  TrueGas Host File
  .TGM  Nem's Mega 3D Terrain Generator
  .TGW  Terragen Atmosphere File
  .TGZ  UNIX Tar File Zipped (short for .tar.gz)
  .THB  KinuPix Skin  [XnView]
  .THD  Thread
  .THEME  Microsoft Plus! Theme File
  .THM  MS Clipart Gallery Database
        Serif DrawPlus Theme
  .THN  Graphics Workshop for Windows Thumbnail
  .THP  TurboTax-related File
        LiveMath Plug-in
  .THR  PROGNOSIS Threshold Document File
  .THS  WordPerfect Thesaurus
  .THU  Command and Conquer Renegade File
  .TIB  Acronis True Image (hard drive partition manager)
  .TIC  Lotto Pro 2002 Ticket
        Arcinfo Coordinates File (GIS-related file)
  .TIE  X-wing Alliance Game File
  .TIF  Tagged Image Format File  [XnView] [IrfanView] [SwiftView]
        Digital Raster Graphic Image
  .TIFF  Tagged Image Format File  [XnView] [IrfanView] [SwiftView]
  .TIG  Tiger Government Map File
  .TIK  Script File for Game Textures (ASCII file)
  .TIL  Togai InfraLogic Fuzzy-C Knowledge Base
        Buttonz & Tilez Texture  [XnView]
        Tilia File
  .TIM  Playstation Game Texture Image  [XnView]
        The Incredible Machine Level File
        TIFF Image (rev 6)  [XnView]
  .TIP  Startup Tip File (various)
  .TIS  MahJongg Tile Set
  .TIX  Hybrid Graphics File (both vector and raster data)
        ASA for UNIX Terminfo Extension File
        Tix Widgets
        DivX File
  .TK   TK Solver File
  .TK2  Take Two/Easy CD Creator Backup
  .TKB  TicketBench Data File (design/print tickets)
  .TKM  Panasonic SD Voice Editor File
  .TJF  VAXTPU Backup File (VAXTPU is default OpenVMS editor)
  .TKN  Liberty BASIC Application Distribution File
  .TKT  TK Solver File
  .TKW  TK Solver File
  .TLB  Remote Automation Truelib Files
        OLE Type Library
        Visual C++ Type Library
        VAX Text Library
        Bubble Chamber Reference Table
  .TLC  Swat Compiled Tood Command Language Source
  .TLD  Trellix File
  .TLE  NASA Two-Line Element Set
  .TLF  Turnpike SCORE Link File
        Avant! Memory Compiler Memory Models Format File
        Gear Track List File (CD burning) (Used to be .CUE; just rename .CUE to .TLF)
        Short Message Service File (GSM phone messaging)
  .TLG  Trellix WebGem
  .TLK  Hand of Fate Archive  [Dragon UnPACKer]
        Lands of Lore Archive  [Dragon UnPACKer]
  .TLP  MS Project Timeline File
  .TLS  Timeless Time & Expense
  .TLT  Trellix Web Design File
        TList Data File
  .TLX  Telex
        Trellix Data File
  .TMA  DCI TradeManager Catalog Archive
  .TMB  Timbuktu Pro Connection Document (remote control software)
  .TMC  DCI TradeManager Catalog Archive
  .TMF  WordPerfect Tagged Font Metric File
  .TMG  The Marketing Game File
  .TMO  Zortech C++ Global Optimizer Output File
  .TMP  Temporary File/Folder
  .TMQ  TestMaster File
  .TMR  Simpsons Cartoon Studio File
  .TMS  Telemate Script
  .TN1  Tiny  [XnView]
  .TN2  Tiny  [XnView]
  .TN3  Tiny  [XnView]
  .TNC  SuperJPG ThumbNail Cache File
  .TNEF  Transport Neutral Encapsulation Format File
  .TNF  Transport Neutral Encapsulation Format File
  .TNK  OMEGA Tank File (Origin Systems game no longer marketed) [Info]
        Nimbus 7 SAMS Data File (pre-launch calibration data)
        TrunkTrac Scanner Info
  .TNL  Thumbnail  [XnView]
  .TNY  Tiny  [XnView]
  .TOC  Eudora Table Of Contents
  .TOL  Kodak Photoenhancer
  .TOP  INMOS Transputer Development System Occam Top Level File
  .TOS  Atari Executable (TOS = The Operating System - Sometimes an archive)
  .TOT  Telelogic Option Templates
  .TP   Turbo Pascal Configuration File
        Turbo Profiler Session-state File
        EROSION 3D Relief Parameters [Format (pdf)]
  .TP3  Harvard Template (Harvard Graphics taken over by Serif)
  .TP4  RollerCoaster Tycoon Track Design Screenshot
  .TPB  HiJaak PCL Soft Font File Backup
  .TPF  HiJaak PCL Soft Font File
  .TPH  Turbo Pascal Help File
  .TPI  Visual Test Shell File (tests BACnet function of building automation equipment) [Also called EPICS (electronic protocol implementation conformance statement)]
  .TPJ  TestStand Project
  .TPL  Turbo Pascal Resident Units
        Harvard Template (Harvard Graphics taken over by Serif)
        fKey Template Designer Template File
        NoteTab Template
        CakeWalk Audio Template File
        DataCAD Template File
        Canvas 7 Template
        Timeslips TSImport Template
        Adobe Photoshop Tool Preset File
        MS Access Workflow Designer
        TextBridge Template
  .TPM  TextPad Macro
  .TPP  Turbo Pascal Protected Mode Units
        Teleport Pro Project (Web spider)
        TypePlus File
  .TPR  GROMACS 3.0 Molecular Dynamics Simulator File
        Together Project Definition
        TMPEG Enc Video Conversion Project File
  .TPS  Clarion for Windows Data File
  .TPU  Turbo Pascal Unit
        VAXTPU Command File (VAXTPU is default OpenVMS editor)
  .TPW  Turbo Pascal Unit
        Turbo Profiler Session-state File
  .TPZ  Compressed File (short for .tar.gz)
  .TR   Turbo Debugger Session-state Settings
        Manual Page Input to UNIX troff -man Command
  .TR2  Turbo Debugger Session-state Settings
  .TR5  Tree Professional File
  .TRC  Power CTrace Debug Support File
        Oracle SQL*Net Trace Debug File
        True BASIC Compiled Code
  .TRE  PC Tools Directory Tree
        VisiRex SDK Tree Function File
        Kith and Kin Export File (document/store family trees)
        TreeAge Decision Tree File
        Wing Commander Series Movie/Game File
        EA SPORTS File
  .TRF  DocuMagix File
  .TRG  Symantec LiveUpdate File
  .TRI  Trigram File
  .TRK  Kermit Script File
        Mixman Studio Track
        Train Dispatcher Railroad Centgralized Traffic Control Simulation
  .TRM  Terminal Settings (various)
        TRiM High-compression Lossless 8 to 32 bit Truecolor Image File
  .TRN  Quattro Translation
        Adobe Pagemaker File
        STN Express Transcript Text File  (search science databases through STNŽ)
        MS SQL Server Transaction Backup
        TextBridge Training Data
        MKS Source Integrity Project Log
  .TRO  Anti-Trojan File
  .TRP  Tripmaker File
  .TRS  Micrografx Executable File
        EROSION 3D Temporal Event File [Format (pdf)]
  .TRT  Team Sports Scheduling System Report Template
  .TRU  True BASIC Source Code
        TruSys System Comparison File
  .TRW  Turbo Debugger Session-state Settings
  .TRX  Emerald PC Authorize Batch Transaction File
  .TS   Tune Smithy File
  .TSC  Top Secret Crypto File
  .TSCE  TextShield Zip-compressed .RTF File (TextShield Compression Engine)
  .TSK  Skins (Themes) for Pocket PC PDAs
        PhotoImpact Quick Command
  .TSL  Borland TeamSource File
  .TSP  Windows Telephony Service Provider
  .TSR  INMOS Transputer Development System Occam Program Source
  .TSS  Team Sports Scheduling System Project File
  .TST  WordPerfect Printer Test File
        TextShield Template
        Test File
  .TSW  TestStand Workspace
  .TSX  Team Sports Scheduling System XML Project File
  .TT   ThinkTank Outliner (old Apple program)
  .TTC  TrueType Compressed Font
  .TTF  TrueType Font
  .TTK  Alchemy Catalyst Translation Toolkit (purchased from Corel)
  .TTL  Tera Term Macro File
  .TTO  IBM Client Access File Transfer Description
  .TTP  Telelogic Tau Project
        Atari TOS Executable With Parameters (TOS-Takes-Parameters)
  .TTR  TeeTree Office File
  .TTW  Telelogic Tau Workspace
  .TTX  Crystal Report Data Connection File
  .TUB  PaintShop Pro Tube File  [XnView]
  .TUD  Thumbs Plus Viewer Graphics
  .TUO  Thumbs Plus Viewer Graphics
  .TUT  Tutorial
  .TV   Paradox Table View Settings
  .TV1  WordPerfect Overflow File Above Doc 1 Insert Point (can be 1-9)
  .TV4  TValue File (Amortization and time-value-of-money calculations)
  .TVM  TVMconv
  .TVO  TeveoLive (video recording)
  .TVS  VectorMAX Streaming Video
  .TVT  RealPlayer
  .TVVI  InterVideo WInDVR
  .TWC  Tripwire Configuration File (intrusion detection)
  .TWD  Simtech MindMapper Mind Map
  .TWE  ThinkWave Educator Data File
  .TWF  TabWorks File
        Georeferenced Information File
  .TWG  ThatWaltGuy Web Server File
  .TWP  Toplevel Computing Fine Words (DOS Word Processor)
        Tripwire Policy File (intrusion detection)
  .TWR  Tripwire Report File (intrusion detection)
  .TWS  TextPad Workspace File
        Tripwire Schedule File (intrusion detection)
  .TWW  Tagwrite Template
  .TX8  DOS Text File
  .TXB  Descent/D2 Encoded Briefing File
  .TXC  Urban Chaos Game File
  .TXF  Compressed File (short for .tar.f)
  .TXI  TeX Support File
  .TXL  Genesis3D Texture File
  .TXM  DATAIR Pension Reporter Data File
  .TXT  Text File (open in Notepad, WordPad, Word, or many other programs)
  .TXW  Yamaha TX16W Wave Files  [Linux Player]
  .TXX  DataPerfect Text Storage
  .TYM  PageMaker Time Stamp
  .TZ   Compressed File (short for .tar.z)
        Ingres Time Zone File
  .TZB  Compressed File (short for .tar.z.btoa)