# TT

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

## 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
* <tt>...</tt> (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

* 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, discoverer of the tombs of Theban Necropolis, Egypt