TT, Tt, tt, or .tt may refer to:

Arts and entertainment

Gaming

  • Manx TT Super Bike, an arcade racing game by Sega
  • Tourist Trophy (video game), a motorcycle racing game for the PlayStation 2
  • T.T., a character in Diddy Kong Racing

Music

  • "TT" (song), a song by Twice
  • Tritone, the musical interval of an augmented fourth or diminished fifth
  • Theresa Wayman (born 1980), American musician, stage name TT
  • Tying Tiffany (born 1978), Italian singer, stage name TT

Other arts and entertainment

  • The Dominators (production code: TT), a 1968 Doctor Who serial
  • T.T., a fictional character in the film The Forever Purge
  • Thomas Thorpe (T.T.), the publisher of Shakespeare's sonnets

Business and organizations

  • TT Electronics, a British maker of automotive components
  • Tom Tailor, a German clothing company
  • TT Games, a British software producer
  • TT News Agency, a Swedish news agency
  • TT Technologies, a construction equipment manufacturer
  • ThunderTalk Gaming, a Chinese esports organization
  • Tigerair Australia (former IATA code: TT), a former low-cost airline
  • Toytown Germany, a website for English-speaking foreigners in Germany
  • Order and Justice (abbreviated TT in Lithuanian), a political party in Lithuania

Language

  • Tatar language (ISO 639-1 code)
  • TT, an emoticon indicating tears streaming from the eyes
  • Totus tuus, a Latin greeting meaning "all yours"

Science and technology

Medicine

  • Tetanus toxoid, a vaccine to prevent tetanus
  • Thrombin time, a coagulation blood test

Computing

  • .tt, the country code top-level domain for Trinidad and Tobago
  • Template Toolkit, a Perl template engine
  • Transaction translator, a particular unit in USB hubs
  • tt-reduction (truth-table reduction), a kind of transformation used in computability theory
  • (short for teletype), an HTML presentation element that writes text in monospace font

Other science and technology

  • TT earthing system (terre-terre), a system of electrical earthing
  • Tiny Telephone, a type of phone connector
  • Telegraphic transfer (T/T), a method of transferring money
  • Terrestrial Time, an astronomical time standard

Sports

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  • Time trial, in racing sports, a race against the clock to secure the fastest time
  • TT Pro League, a professional association football league for clubs in Trinidad and Tobago

Motorcycle races

  • Isle of Man TT, an annual motor-cycle racing event held on the Isle of Man
  • TT Zero, an Isle of Man TT race for solo motorcycles producing low-emissions
  • Dutch TT, a motorcycling event, held on the last Saturday of June
  • Welsh TT, historic motorcycle road races originally held annually on Pendine Sands, Wales, UK circa 1920
  • Welsh TT, historic motorcycle road races originally held annually at Mynydd Epynt, Wales, UK circa 1950

Transportation

  • Audi TT, a 2-door sports car produced by Audi
  • TT (New York City Subway service), a former New York City Subway service, US

Other uses

  • Therapeutic touch, a pseudoscientific energy therapy
  • TT pistol, a Soviet military automatic pistol designed by Fedor Tokarev
  • TT scale, a niche model railroading scale
  • Trinidad and Tobago (ISO 3166 code)
  • Trust Territory, a former geopolitical status
  • TT bar, a ten tola gold bar
  • Theban Tombs, catalog designation of the tombs of Theban Necropolis, Egypt

See also

  • Atari TT030, a computer based on the Motorola 68030 CPU
  • TT-Line, a German shipping company
  • TT-Line Company, a ferry company operating the Spirit of Tasmania service, Australia
  • Pi (letter) (Π)
  • TTT (disambiguation)
  • T&T (disambiguation)
  • 2T (disambiguation)
  • T2 (disambiguation)
  • T-square (disambiguation)
  • Tourist Trophy (disambiguation)