TT
TT, Tt, tt, or .tt may refer to:
Organizations
Science and technology
- Temco TT Pinto, a jet aircraft trainer
- Terrestrial Time, an astronomical time standard
- Teratesla, a unit of magnetic field
- Toilet, a plumbing fixture
- Tritium-Tritium nuclear fusion reaction, a type of reaction used in certain neutron generators
- TT resembles
, a mathematical constant, see pi
- Technology transfer, a process of knowledge transfer
- TT pistol, a Soviet firearm
- Text telephone, a telecommunications device for the deaf
- TT, an earthing system in electric supply systems
- Theban Tombs, Tombs of the Theban Necropolis, burial site in Ancient Egypt. See List of Theban Tombs.
Medicine and biology
Computers
- Atari TT, a computer based on the Motorola 68030 CPU
- Trouble Ticket, a way to report problems with software systems to the support team using a Trouble ticket system
- Truth-table reduction (or tt-reduction), a kind of transformation used in computability theory
- Trending topic, aterm used on Twitter
- Timed Text, a W3C format for captioning, subtitling timed text media on the Web
- TrueType, a font format
- Template Toolkit, a Perl template engine
- "TT", an emoticon indicating tears streaming from the eyes
- <tt>...</tt>, an HTML presentation element that writes text in monospace font
- .tt, the Country code top-level domain for Trinidad and Tobago
Video games
Music theory
- Tritone, or augmented fourth, a musical interval that spans three whole tones
Television, film, music, and comic books
Sports, games, hobbies, and theme park rides
- TT scale (Table Top scale), a niche model railroading scale
- Torrential Tribute, a card in the Yu-Gi-Oh! Trading Card Game
- Top Trumps, a card game
- Table tennis, or ping-pong
- Time trial, in racing sports, a race against the clock to secure the fastest time
- TT Zero, an Isle of Man TT race
- Trenton Titans, a former name of Trenton Devils ECHL ice hockey team
- TT Pro League, a professional association football clubs in Trinidad and Tobago
- Test Track, a term used in Disney's Epcot theme park
- Tourist Trophy (disambiguation), several meanings
Places
- Tokyo Tower, a tower in Tokyo, Japan
- Twin Towers, the tallest two towers of the World Trade Center in New York City, destroyed September 11, 2001
- Trinidad and Tobago (ISO 3166 digram), an archipelagic state in the southern Caribbean
Automobiles and transportation
- Audi TT, a 2-door sports car produced by Audi
- Twin-turbo, a system of two turbochargers on an automobile engine
- TT-Line Pty. Ltd., a ferry company operating from Tasmania to Australia
Business
- Telegraphic transfer (or telex transfer or T/T), a method of transferring money
- TT bar, a ten tola gold bar traded in 3.75 oz (117 g) weights
Other uses
- Tatar language ISO 639-1 code
- Teetotal (or T-total), the practice and promotion of complete abstinence from alcoholic beverages