List of acronyms: T
This list contains acronyms, initialisms, and pseudo-blends  that begin with the letter T. 
For the purposes of this list:

acronym = an abbreviation pronounced as if it were a word, e.g., SARS = severe acute respiratory syndrome, pronounced to rhyme with cars
initialism = an abbreviation pronounced wholly or partly using the names of its constituent letters, e.g., CD = compact disc, pronounced cee dee
pseudo-blend = an abbreviation whose extra or omitted letters mean that it cannot stand as a true acronym, initialism, or portmanteau (a word formed by combining two or more words).(a) = acronym, e.g.: SARS – (a) severe acute respiratory syndrome
(i) = initialism, e.g.: CD – (i) compact disc
(p) = pseudo-blend, e.g.: UNIFEM – (p) United Nations Development Fund for Women
(s) = symbol (none of the above, representing and pronounced as something else; for example: MHz – megahertz)Some terms are spoken as  either acronym or initialism, e.g., VoIP, pronounced both as voyp and V-O-I-P.
(Main list of acronyms)

T – (s) Tera – tesla – tritium

TA
ta – (s) Tamil language (ISO 639-1 code)
Ta – (s) Tantalum
TA
(i) Target Acquisition
Teaching Assistant
(s) teraampere
(i) Territorial Army (UK)
(s) Tristan da Cunha (ISO 3166 digram)
TAA
(i) Transparency Anti-Aliasing
(a) Trans Australia Airlines
TAAC – (i/a) Trans America Athletic Conference, the original name for the US college sports league now known as the ASUN Conference
TAACOM – (p) U.S. Theater Army Area Command
TAADCOORD – (p) Theatre Army Air Defence Co-ordinator
TAAR – (i) Trace Amine-Associated Receptor
TAC – (a) U.S. Tactical Air Command (1946–1992)
TACAMO – (p) Take Charge and Move Out (U.S. military)
TACAN – (p) Tactical Air Navigation
TACC
(i) Tactical Air Control Centre
(USAF) Tanker Airlift Control Center
TACCO – (p) Tactical Coordinator
TACCSF – (i) U.S. Theater Aerospace Command & Control Simulation Facility
TACDAR – (p) Tactical Detection And Reporting
TACP – (i) Tactical Air Control Party – Technology Applications Certification Program
TACSOP – (p) Tactical SOP (Standing Operating Procedure)
TADIL – (p) Tactical Digital Information Link
TADL – (a) Tactical Air Data Link ("taddle")
TADSS – (i) Training Aids, Devices, Simulators, and Simulations
TAF - (i) Trading Activity Fee assessed by FINRA to recover the costs of supervising and regulating firms.
tah – (s) Tahitian language (ISO 639-2 code)
TAI – (i) Target[ed] Area of Interest
TAJ – (i) Tom and Jerry
TAJT – (i) Tom and Jerry Tales
TALES – (a) Technical Advice and Lexicon for Enabling Simulation
tam – (s) Tamil language (ISO 639-2 code)
TAN – (s) Tanzania (IOC and FIFA trigram, but not ISO 3166)
TANJ – (a) There Ain't No Justice (used as expletive in the Ringworld novels)
TANP – (i) Terrain-Aware Network Planner
TANSTAAFL – (a) There Ain't No Such Thing As A Free Lunch (coined by author Robert A. Heinlein in his The Moon Is a Harsh Mistress)
TAPPS – (a) Texas Association of Private and Parochial Schools
TARDIS – (a) Time And Relative Dimension In Space (from Doctor Who)
TARP – (a) Transparency Accountability Rights for Parents (coined by Karen Plumridge, founder of Black Ribbon Gold Heart)
TAROT – (a) Télescope à action rapide pour les objets transitoires (French, "Transient Object Rapid Action Telescope")
TAS – Tasmania (postal symbol)
TASER – (a) Thomas A. Swift's Electric Rifle
TASM – (i) Tactical Air-to-Surface Missile
tat – (s) Tatar language (ISO 639-2 code)
TAT – (i) Tourism Authority of Thailand
TATP – (p) TriAcetone TriPeroxide

TB
Tb – (s) Terbium
TB – (p) Tuberculosis
TBA – (i) to be announced
TBBPA – (p) TetraBromoBisPhenol-A
TBC – (i) to be confirmed, to be continued
TBD – (i) "to be documented", "to be determined", or "to be decided"
TBD – (i) Torpedo Boat Destroyer
TBF – To be fair
TBGRI – (i) Tropical Botanic Garden and Research Institute, India
TBH – (i) To Be Honest
TBL – (i) Turkish Basketball League
TBM – (i) Tactical Ballistic Missile – Theatre Ballistic Missile
TBS – (i) Turner Broadcasting System
TBT – (p) Tributyltin

TC
TCC – (s) Tarrant County College
Tc – (s) Technetium
TC – (s) Teracoulomb – Turks and Caicos (ISO 3166 digram) – United Arab Emirates (FIPS 10-4 country code; from Trucial Coast States)
TCA – (i) Transformational Communications Architecture – (s) Turks and Caicos (ISO 3166 trigram)
TCAS – (i) Traffic Collision Avoidance System
TCAA – (i) Top Counter-Assault Agents
TCBY - (i) The Country's Best Yogurt
TCCCS – (i/a) Tactical Command, Control, and Communications System ("ticks")
TCD – (s) Chad (ISO 3166 trigram)
TCG – (i) Trusted Computing Group – Türkiye Cumhuriyeti Gemisi
TCHD – (i) Truck Cargo Heavy Duty
TCL – (i) Tool Command Language
TCM – (i) Turner Classic Movies
TCP – (i) Traffic Control Point – Transmission Control Protocol – Trichlorophenol
TCU – (i) Texas Christian University
TCWMS – (i) Tele-Center Workforce Management System
TCW – (i) Tasty Coma Wife

TE
te – (s) Telugu language (ISO 639-1 code)
Te – (s) Tellurium
TE – (i) Tactical Exploitation – (p) Testosterone to Epitestosterone ratio – (i) Tight end (American football; position generally not used in modern Canadian football)
TEAL – (a) Tasman Empire Airways Limited
Team – (a) Together everyone achieves more
TEAMS – (a) The East African Marine System (fiber optic cable)
TED – (a) Technology Entertainment Design prize
TEEL – parts of a body paragraph in an essay: * T - Topic sentence E - Explanation  E - Evidence L - Link
TEETH – (a) Tried Everything Else, Try Homeopathy (medical diagnosis in-joke)
tel – (s) Telugu language (ISO 639-2 code)
TEL – (a/i) Transporter, Erector and Launcher
TELAR – (a) Transporter, Erector, Launcher And Radar
TEMO – (a) Training, Exercise, and Military Operations
TENCAP – (p) Tactical Exploitation of National Capabilities
TER's(Stargate) – Transphase Emission Rods
TERS – (i) Tactical Event Reporting System
TES – (i) Tactical Event System
TEST – (a) Thesaurus of Engineering and Scientific Terms
TEU – (i) Twenty-foot equivalent unit (cargo capacity)
TeVeS – (p) Tensor Vector Scalar theory

TF
TF –
(s) French Southern Territories (ISO 3166 digram)
(i) Task Force
(s) Terafarad
(?) Too Far
(i) Team fortress (hence TF2 is Team Fortress 2)
Transformers
T/F – (i) True/False (=Yes/No)
TFMPP – (p) Trifluorophenylmethylpiperazine
TFR – (i) Total Fertility Rate
TFT – (i) Thin-Film Transistor
TFTP –
(i) Trivial File Transfer Protocol
(i) Terrorist Finance Tracking Program

TG
tg – (s) Tajik language (ISO 639-1 code)
Tg – (s) Teragram
TG – (s) Togo (ISO 3166 digram)
TGA – (s) Tonga (IOC and FIFA trigram, but not ISO 3166)
TGB – (i) Tres grande bibliothèque (French, "Very Large Library"), a sarcastic nickname for the Bibliothèque nationale de France
TGIF – (i) Thank God It's Friday, Toes Go In First
tgk – (s) Tajik language (ISO 639-2 code)
tgl – (s) Tagalog language (ISO 639-2 code)
TGO – (s) Togo (ISO 3166 trigram)
TGT
(p) Target (also the ticker symbol for Target Corporation)
(i) Ticket Granting Ticket (computer security)
(i) Tyrese, Ginuwine, Tank – see TGT (group) for their collaboration
TGV
(i) Tanjong Golden Village (Malaysian cinema chain)
(p) Tanora malaGasy Vonona (Malagasy, "Young Malagasies Determined" – political party)
(i) Test Generation with Verification
Train à grande vitesse (French for "High-Speed Train")

TH
th – (s) Thai language (ISO 639-1 code)
Th – (s) Thorium
TH – (s) Terahenry – Thailand (ISO 3166 and FIPS 10-4 country code digram)
tha – (s) Thai language (ISO 639-2 code)
THA – (s) Thailand (ISO 3166 trigram)
THAAD – (a/i) Terminal High Altitude Area Defence
THB – (s) Thai baht (ISO 4217 currency code)
THEGENTRY – (a) The High-End Group of Earth's New Technologies Research Yield
THEL – (a) Tactical High Energy Laser ACTD
THG – (p) Tetrahydrogestrinone
ThG – (p) Graduate of Theology
THSU - (a) Texas Health and Science University

TI
ti – (s) Tigrinya language (ISO 639-1 code)
Ti – (s) Tebi – Titanium
TI – (s) Tajikistan (FIPS 10-4 country code) – (i) Thermal Imaging – Threat Identification – Training Instructor – Texas Instruments
TIA – (i) Total Information Awareness initiative
TIA – (i) Transient Ischemic Attack
TIALD – (i) Thermal Imaging and Airborne Laser Designation
TIAA-CREF – (i, pronounced as "T-I-A-A-cref") Teachers Insurance and Annuity Association – College Retirement Equities Fund
TIBS – (a) Tactical Information Broadcast System
TIC – (a) Troops In Contact
TID – (p) Target Identification – (i) ter in die (Latin, "three times daily")
TIGERS – (a) Topologically Integrated Geographic Encoding and Referencing System
TIM – (a) Technical Information Memorandum – Technical Interchange Meeting – Toxic Industrial Material – Telecom Italia Mobile
TIMS – (a) Tactical Internet Management System – The Institute of Management Sciences – The International Molinological Society – Thermal Infrared Multispectral Scanner – Thermal Ionization Mass Spectrometry – Travel Information Management Services – Tuberculosis Information Management System
TINC – (a) There Is No Cabal
TINY – That Is, Not You (internet slang)
TIP – (a) Thermal Identification Panel
tir – (s) Tigrinya language (ISO 639-2 code)
tits – Toes in the Sand

TJ
TJ – (s) Tajikistan (ISO 3166 digram) – Terajoule
TJD – (i) Truncated Julian Day
TJK – (s) Tajikistan (ISO 3166 trigram)
TJS – (s) Tajik somoni (ISO 4217 currency code)

TK
tk – (s) Turkmen language (ISO 639-1 code)
TK – (s) Terakelvin – Tokelau (ISO 3166 digram)
TKBL – (i) Türkiye 1. Kadınlar Basketbol Ligi, the Turkish-language name of the Turkish Women's Basketball League
TKL – (s) Tokelau (ISO 3166 trigram)
TKM – (s) Turkmenistan (ISO 3166 trigram)

TL
tl – (s) Tagalog language (ISO 639-1 code)
Tl – (s) Thallium
TLPM – T1 Line Performance Monitor
TL
(i) Team Leader
(s) Teralitre
Timor-Leste (ISO 3166 digram)
(p) ThermoLuminescence
TL;DR (i) – Too long; didn't read
TLATOJL – The Life and Times of Juniper Lee
TLA
(i) Three-Letter Abbreviation/Acronym
(ii) 'Three-Letter Agency' (i.e. CIA, FBI, NSA, etc.)
(i) Temporal light artefacts
TLAM – (i) Tomahawk Land Attack Missile
TLAR
(i) That Looks About Right (chat shorthand)
Transporter-Launcher And Radar
TLC
(i) Tender Loving Care
The Learning Channel (now known strictly by the initials)
Thin-layer chromatography
T-Boz, Lefteye, Chilli
Tables, Ladders, and Chairs (type of professional wrestling match)
TLD
(i) Thermoluminescent Dosimeter
Top-Level Domain
TLE
(i) Temporal light effects
TLI
(i) Temporal light interference
TLM
(i) Traditional Latin Mass
Tridentine Latin Mass
Transaction Lifecycle Management
(i) Temporal light modulation
TLS
(s) Timor-Leste (ISO 3166 trigram)
(i) Times Literary Supplement

TM
Tm
(s) Terameter
Thulium
TM
(i) Technical Manual
Theater Missile
Thematic Mapper
(p) trademark (often written in small superscript type: TM or ™)
(i) Turing machine
(s) Turkmenistan (ISO 3166 digram) Tympanic Membrane
TMA
(i) Terminal Maneuvering Area (restricted flying zone)
Texas Medical Association
Tristeza y muerte de agave (Spanish, "wilting and death of agave") – a disease affecting the blue agave, from which the popular spirit tequila is produced
TMAP – (a/i) Texas Medication Algorithm Project
TMC – (i) The Movie Channel
TMD – (i) Theater Missile Defense
TMDK – (i) The Mighty Don't Kneel (Australian professional wrestling stable also active in Japan)
TMI – (i) Too Much Information
TMJ – (i) TemporoMandibular Joint (syndrome)
TMM – (s) Turkmen manat (ISO 4217 currency code)
TMNT – (i) Teenage Mutant Ninja Turtles
TMO
(i) Table Mountain Observatory
Television match official (rugby union)
TMP
(s) East Timor (ISO 3166 trigram; obsolete 2002)
(p) Temporary
TMPG – (i) Transparent Multiplatform Gateway
TMR – (i) Twin Main Rotors (helicopter type)
TMS – (i) Transcranial Magnetic Stimulation
TMT – (i) Thirty Meter Telescope
TMTOWTDI – (i) There's More Than One Way To Do It (from Perl)
TMZ – (i) Thirty-Mile Zone, an area in and around Los Angeles considered "local" under entertainment industry union work rules

TN
tn – (s) Tswana language (ISO 639-1 code)
TN
(s) Tennessee (postal symbol)
Teranewton
Tonga (FIPS 10-4 country code)
Tunisia (ISO 3166 digram)
TNA – (i) Total Nonstop Action Wrestling, a former name of the professional wrestling promotion now known as Impact Wrestling
TND – (s) Tunisian dinar (ISO 4217 currency code)
TNO – (i) Trans-Neptunian Object
TNT
(i) Thomas Nationwide Transport, an Australian company that was one of the predecessors to the PostNL (previously TNT N.V) and the current TNT Express
(p) TriNitroToluene
(a/i) Turner Network Television

TO
to – (s) Tongan language (ISO 639-1 code)
T/O – (i) Theatre of Operations
TO
(s) Togo (FIPS 10-4 country code)
Tonga (ISO 3166 digram)
TOA
(i) Table Of Authorities
Total Obligation Authority (accounting)
TOAD
(a) Temporary, Obsolete, Abandoned, or Derelict site (urbanism)
Towed Optical Assessment Device
TOBS – (a) Time of OBServation
TOC
(a/i) Table Of Contents
Tactical Operations Centre
(i) Temporo-Occipital transition Cortex
Top of Concrete
To-do – (s) To-do-List
TOG – (s) Togo (IOC and FIFA trigram, but not ISO 3166)
TOGS – (a) Thermal Observation Gunnery Sight
TOMS – (a) Total Ozone Mapping Spectrometer (satellite instrument)
ton – (s) Tongan language (ISO 639-2 code)
TON – (s) Tonga (ISO 3166 trigram)
TOP – (s) Tongan pa'anga (ISO 4217 currency code)
TOS
(a) Tape Operating System
Terms of service
The Original Series, used to distinguish the first Star Trek TV series from other parts of the media franchise
Tramiel Operating System
TOT – (i) Time On Target
TOW – (a) Tube-launched, Optically tracked, Wire-guided (anti-tank missile)

TP
TP
(s) East Timor (ISO 3166 digram; obsolete 2002)
São Tomé and Príncipe (FIPS 10-4 country code)
(i) Training Practice
Trident Ploughshares
TPE – (s) Chinese Taipei (IOC and FIFA trigram for the country also known as Taiwan)
TPI – (i) The point is
TPO – (p) Thrombopoietin
TPS – (i) The Pennington School
TPTB – (i) The Powers That Be (often used to refer to the people responsible for the content of TV series or movies)

TQ
TQ – (i) Top Qualifier (similar to Pole Position in car racing)

TR
tr – (s) Turkish language (ISO 639-1 code)
TR – (s) Turkey (ISO 3166 digram)
TRA – (i) Technology Readiness Assessment
TRAC – (p) (U.S. Army) TRADOC Analysis Center
TRACON – (a) Terminal Radar Approach Control
TRADOC – (p) (U.S. Army) Training and Doctrine Command
TRAIN – (p) Tourist Railway Association, Inc.
TRANSCOM – (p) U.S. Transportation Command
TRAP – (p) Tactical Receive equipment and related Applications
TRASANA – (p) TRADOC Systems Analysis Agency
TRD – (i) Towed Radar Decoy
TRIGAT – (p) Third Generation Antitank (missile)
TRIPS - (a) Trade-Related Aspects of Intellectual Property Rights
TRL – (i) Technology readiness level
Trp – (s) Troop
TRP
(i) Target Reference Point
(p) Time of Reporting
TRPF – (i) Tendency of the rate of profit to fall
TRU – (a) Transuranic
TRUEX – (p) Training in Urban Environment Exercise
TRW – (i) Thompson Ramo Wooldridge Inc.
TRY – (s) Turkish lira (ISO 4217 currency code)

TS
ts – (s) Tsonga language (ISO 639-1 code)
Ts – (s) Terasecond
TS
(s) Terasiemens
Thunderstorm (METAR code)
Tunisia (FIPS 10-4 country code)
(i) TinySex
Transsexual
(i) "Tough Sh*t"
TSA
(i) Theatre Storage Area
Time Slot Allocation
Transportation Security Administration
The Salvation Army
TSCA – (a) Toxic Substances Control Act ("tosca")
TSEC – (i) Transmission Security Encryption Code
TSL – (i) Transportation Security Laboratory
tsn – (s) Tswana language (ISO 639-2 code)
TSN
(i) The Sporting News (historic name of the periodical now known as Sporting News)
The Sports Network
tso – (s) Tsonga language (ISO 639-2 code)
TSO
(i) The Stationery Office (was HMSO until 1996)
(U.S.) TRICARE Support Office
(i) Trans-Siberian Orchestra (band)
TSOP
(i) Tactical Standing Operation Procedure
The Sound of Philadelphia (classic 1970s R&B instrumental)
TSR – many, including terminate-and-stay-resident (program)
TSSIA – (i) the subject says it all

TT
tt – (s) Tatar language (ISO 639-1 code)
TT
(s) Teratesla
(i) Terrestrial Time
Tourist Trophy (Motorcycle sport)
(s) Trinidad and Tobago (ISO 3166 digram)
TTBAO - Things To Be Aware Of
TTCT – Torrance Tests of Creative Thinking
TTD – (s) Trinidad and Tobago dollar (ISO 4217 currency code)
TTO – (s) Trinidad and Tobago (ISO 3166 trigram)
TTFN – (i) Ta Ta For Now
TTL
(i) Tax, Title, License
(i) Through-the-lens (photography)
Time 'till live
Time to live
Transistor–transistor logic
TTP
(i) Tactics, Techniques, and Procedures
Thrombotic thrombocytopenic purpura
Trailer Transfer Point
TTTEAF – Thomas the Tank Engine and Friends
TTY – (i) TeleTYpewriter (Printer)
TTYL – (i) Talk To You Later (Internet slang)
TTZ – (p) Tetrazolium

TU
TU – (i) Technische Universität (German for "Technical University") – Thammasat University (Thailand) – (s) Turkey (FIPS 10-4 country code)
TUC – (i) Trades Union Congress
TUG – (a) TeX Users Group
TUI – (a/i) Text-based user interface (cf. CLI), among other uses
tuk – (s) Turkmen language (ISO 639-2 code)
TUN – (s) Tunisia (ISO 3166 trigram)
TUNS – (i) Technical University of Nova Scotia
Tur – (s) Turkish language (ISO 639-2 code)
TUR – (s) Turkey (ISO 3166 trigram)
TUSK – (a) Tank Urban Survival Kit
TUV – (s) Tuvalu (ISO 3166 trigram)

TV
Tv – (i) Time value, a designation seen on some camera dials for shutter priority mode
TV
(i) Television
(s) Teravolt
(i) Transvestite
(s) Tuvalu (ISO 3166 and FIPS 10-4 country code digram)
TVA – (i) Tennessee Valley Authority
TVG
(p/i) Television Games (Network)
(i) Tick, Very Good, Often used by School Teachers when marking homework etc. (Tick VG)
TVR – (i) TreVor (Wilkinson) Racing
TVS – (i) Tornado vortex signature

TW
TWA - Trans World Airlines
tw – (s) Twi language (ISO 639-1 code)
TW – (s) Republic of China (Taiwan) (ISO 3166 and FIPS 10-4 country code digram) – terawatt
TWAIN – (a) Technology Without An Interesting Name
TWD – (s) Taiwan dollar (ISO 4217 currency code)
TWE – (a) Trans World Entertainment
twi – (s) Twi language (ISO 639-2 code)
TWI – (i) The Welding Institute
TWN – (s) Republic of China (Taiwan) (ISO 3166 trigram)
TWP – (i) Technical Working Paper
Twp - township
TWS – (i) Thermal Weapon Sight – Track While Scan
TWT - traveling wave tube
TWX - telex
TWIP – (a) Take What Insurance Pays – When a surgeon agrees to accept a lower payment than he ordinarily would for a procedure and not charge the patient the difference

TX
TX – (s) Texas (postal symbol) – Transmit – Turkmenistan (FIPS 10-4 country code)
TXV – Thermostatic Expansion Valve

TY
ty – (s) Tahitian language (ISO 639-1 code)
TYT – Take Your Time – Internet chat abbreviation

TZ
TZ – (s) Tanzania (ISO 3166 and FIPS 10-4 country code digram)
TZA – (s) Tanzania (ISO 3166 trigram)
TZC – (p) Tetrazolium chloride
TZS – (s) Tanzanian shilling (ISO 4217 currency code)


== References ==