TT

• 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

• "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

• 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

• 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

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

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

• .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
• {{tag|tt}} (short for teletype), an HTML presentation element that writes text in monospace font

• 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

• 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

• 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

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

• 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, discoverer of the tombs of Theban Necropolis, Egypt

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• 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)
• 2T (disambiguation)
• T2 (disambiguation)
• T-square (disambiguation)
• Tourist Trophy (disambiguation)
• {{srt}}

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