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), 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 TT pistol, a Soviet military automatic pistol designed by Fedor Tokarev Tiny Telephone, a type of phone connector Telegraphic transfer (T/T), a method of transferring money Terrestrial Time, an astronomical time standard
Sports
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)