T. J.Kealy

T is the twentieth letter of the Latin alphabet. (For the same letterform in the Cyrillic and Greek alphabets, see Te and Tau respectively).

T may also refer to:

Codes and units

* T, Tera- as in one trillion
* T, the symbol for "True" in logic
* T, the usual symbol for period, the reciprocal of frequency
* T, the symbol for Tesla, the SI unit of magnetic field
* t, the SI symbol for tonne or ''metric ton''
* t, the usual symbol for time
* t, the angular coordinate of the polar coordinate system (usually ϕ or θ) is sometimes denoted by t
* $\tau$, the symbol for torque
* ⊤, the top element of a partially ordered set
* T, short for tablespoon
* t, short for teaspoon

Names

* Titus (praenomen), common name throughout Roman history, regularly abbreviated T

Entertainment

Literature

* ''T'' (''New York Times''), a fashion magazine
* ''T'', a novel by Victor Pelevin
* T-unit, a grammatical term
* '' "T" Is for Trespass'', the twentieth novel in Sue Grafton's "Alphabet mystery" series, published in 2007

Television

* Mr. T (b. 1952), American television actor
*T, the production code for the 1965 ''Doctor Who'' serial ''Galaxy 4''
* The T logo for the American Spanish-language network Telemundo

Music

* ''T'' (Funker Vogt album), a 2000 aggrotech album by Funker Vogt
* ''T'' (TVXQ album), a 2008 TVXQ album
* ''T'' (Teflon Brothers album), a 2009 album by Finnish hip hop group Teflon Brothers
* "t," an Iamamiwhoami song
* T, abbreviation for tutti
* T, abbreviation for tenor
* t, note abbreviation in tonic sol-fa for seventh scale degree
* T-Babe, a virtual pop singer

Video games

* T (teen), a game rating from the Entertainment Software Rating Board which the board believes is suitable for those aged 13 years and older

Finance and business

* T-Mobile, mobile network operator based in Germany
* T-Online, German Internet Service Provider
* Treasury (as in T-Bill, T-Bond, T-Note)
* T, a mintmark for Nantes, France
* T, the U.S. ticker symbol for AT&T on the New York Stock Exchange
* The AT&T Center in San Antonio, Texas, United States

Science

Biology and medicine

* Troponin T, one of the three troponins
* Haplogroup T (mtDNA), a human mitochondrial DNA (mtDNA) haplogroup
* T cells, part of the components of the immune system along with B cells
* T, the one-letter code used for threonine, one of the 20 amino acids used in transcription of a polypeptide chain
* Thymine, one of the four nucleic acids of DNA
* T, gene and protein symbol for the transcription factor brachyury
* Thoracic vertebrae T-1 through T-12
* T wave, the repolarization wave of cardiac ventricles in electrocardiography
* T, a common abbreviation for the male sex hormone testosterone

Palaeontology

* T-rex, abbreviation for ''Tyrannosaurus rex''

Meteorology

* Thunderstorm
* T-number in the Dvorak technique, a way to rate storm intensity

Physics and chemistry

* T, symbol for tritium, a radioactive isotope of hydrogen
* T-symmetry in particle physics
* Class T, a cool brown dwarf class of stars
* ΔT (disambiguation): a variety of meanings related to changes in a quantity denoted by T, such as time or temperature

Mathematics

* T score, a statistical term
* Student's t-distribution, statistical term
* System T, in modal logic
* $\mathbb^n$, the ''n''-dimensional torus ($\mathbb^n/\mathbb^n$)
* $\mathbb$, the Circle group
*A^T, the transpose of a Matrix (mathematics), matrix A

Technology and computing

* T (programming language), created in the early 1980s
* T, Toshiba's mobile phones in Japan
* T, an abbreviation for telephone number
* t, an abbreviation for microblogging service Twitter
* t-distributed stochastic neighbor embedding, a machine learning algorithm for data visualization
* T-pose, a default pose for a 3D model's skeleton before it is animated
* Landing T, a ground signal that indicates the wind direction in aerodromes
* Transfer (computing), in computer technology, a data transfer, often used to measure speed (e.g. megatransfers per second)

Transportation

Equipment

* Ford Model T, produced 1908–1927
* NZR T class steam locomotives in New Zealand
* Tank locomotive
* OS T1000, an Oslo Metro train
* T gauge, a scale for model railroad trains

Public transport

* Massachusetts Bay Transportation Authority (nicknamed the "T")
* T Third Street in San Francisco, California
* Oslo Metro or
* Pittsburgh Light Rail, commonly called the T
* Stockholm Metro or ''T-bana''
* T (New York City Subway service)
* Trinity Metro, formerly known as "The T"

Phonetics

* [t], the International Phonetic Alphabet character for the voiceless alveolar plosive
* [ʈ], the IPA character representing the voiceless retroflex stop

Other uses

* "The T", a nickname for the rural part of Pennsylvania due to its shape when eliminating the Pittsburgh and Philadelphia Metropolitan Areas, also known by its slang term Pennsyltucky
* Т, a letter of the Cyrillic alphabet
* T-bone steak, the cut of meat
* T-shirt, a type of clothing
* T in the Park, an annual music festival, held in Kinross, Scotland and named after its main sponsor, the brewing company Tennents
* Crossing the T, a classic naval warfare tactic
* Tech Tower#Stealing the 'T', Stealing the 'T', an historic college prank as the "T" is stolen from the Tech Tower at the Georgia Institute of Technology
* List of military time zones#T, T (Tango), the military time zone code for UTC−07:00

See also

* T class (disambiguation)
* Class T (disambiguation)
* T-type (disambiguation)

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