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{{wiktionary|T1}}
'''T1''', '''T01''', '''T.1''' or '''T-1''' may refer to:

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==Places==
* [[Target One]], a Mesoamerican archaeological site in Honduras
* [[Tour T1]], an office skyscraper in La Défense, Paris, France
* [[T1 Mall of Tallinn]], shopping and entertainment centre in Tallinn, Estonia
* [[Nakano Station (Tokyo)]], station number T-01 in Tokyo Metro Tozai Line

=== In space ===
* [[T1 Aquarii]], a star in the constellation Aquarius
* [[T1 Carinae]], a star in the constellation Carina
* [[1293 T-1]], the asteroid "T-1", a main-belt asteroid, the 1293rd asteroid registered

=== Rail lines ===
* [[Île-de-France tramway Line 1]], a.k.a. T1, a tramway near Paris, France
* [[North Shore & Western Line]], a commuter rail line in Sydney, Australia
* [[T1 (Istanbul Tram)]], a tram line in Istanbul, Turkey
* [[T1 (Tram İzmir)]], a tram line in İzmir, Turkey

=== Roads ===
* [[T1 road (Zambia)]], a road in Zambia
* [[T1 road (Tanzania)]], a road in Tanzania
* [[Estonian national road 1]], officially T1, connecting Tallinn and Narva

==Biology==
* The first of the [[thoracic vertebrae]] in the vertebral column
* [[Thoracic spinal nerve 1]], a nerve emerging from the vertebrae
* [[Cyclin T1]], a human gene
* [[GalNAc-T1]], a human gene
* [[Ribonuclease T1|Ribonuclease T<sub>1</sub>]], a fungal endonuclease
* [[TNM staging system]], classification for a small cancer tumor
* T1, longitudinal relaxation time, in [[magnetic resonance imaging]] (MRI), a measure of the time taken for spinning protons to realign with the external magnetic field

==Computing, electronics==
* [[T1 font]], or cork encoding, a character encoding
* [[Apple T1]], a system on a chip used by Apple
* [[UltraSPARC T1]], a microprocessor

===Telecommunications===
* T1, a component of the [[T-carrier]] system for telecommunication
* AYYA T1, a smartphone developed by Rostec as part of the [[Ayya (smartphone)]] line
* T1 Phone, see [[Trump Mobile]]
* [[vivo T1]] series, the 5 smartphones manufactured by Vivo Communication Technology Co.

==Transportation==
===Aircraft===
* [[Raytheon T-1 Jayhawk]], a jet aircraft used by the US Air Force for advanced pilot training
* [[Lockheed T2V SeaStar]], a.k.a. T1 Seastar, a carrier-capable jet trainer in the US Navy
* [[Fuji T-1]], Japan's first jet-powered trainer aircraft
* [[Perry Beadle T.1]], a 1913 British biplane fighter 
* Loring T-1, an interwar period Spanish biplane trainer prototype variant of the [[Loring R-III]]
* [[Sopwith Cuckoo]], a British biplane torpedo bomber of 1918
* the Terminal 1 of [[airport]]

===Automobiles===
* [[Bentley T-series]], Bentley Motors model in the UK
* [[Caparo T1]], a 2006 British sports car
* [[CWS T-1]], first serially-built car manufactured in Poland
* [[Ford T1 platform]], a large SUV automobile platform
* [[Jetour T1]], a compact crossover SUV
* [[Mercedes-Benz T1]], a 1977 van/truck also called a transporter
* [[Volkswagen Type 2 (T1)]], the first generation of Volkswagen transporter

===Rail===
* [[T series (Toronto subway)]], a subway car in Toronto, Canada
* [[LSWR T1 class]], an 1888 0-4-4T steam tank locomotives class
* [[Pennsylvania Railroad class T1]], a 1942 4-4-4-4 steam locomotive class
* [[Reading T-1]], a 1945 4-8-4 steam locomotive class
* [[LNER Class T1]], a class of British steam locomotives 
* [[Tatra T1]], a 1951 Czechoslovak tramcar

===Racing===
* [[Ferrari 412 T1]], a 1994 Formula One car

===Ships===
* [[USS T-1|USS ''T-1'']], several United States Navy ships
* [[HMNZS Matai (T01)|HMNZS ''Matai'' (T01)]], a Royal New Zealand Navy lighthouse tender of 1941
* [[MV Transpacific (T-1)|MV ''Transpacific'' (T-1)]], a 1992 US oil tanker
* [[Yugoslav torpedo boat T1|Yugoslav torpedo boat ''T1'']], a torpedo boat in the Yugoslav Navy, 1921–1941
* [[T1 tanker]] a mass-produced tanker used during and after World War II

===Buses===

==Tanks and weapons==
* [[T1 Light Tank]], a U.S. prototype tank
* [[EE-T1 Osório|EE-T1 ''Osório'']], a 1985 Brazilian main battle tank
* [[AC NM AE T1 mine]], a Brazilian anti-tank blast mine
* [[AP NM AE T1 mine]], a Brazilian anti-personnel mine
* [[G7a torpedo]], a WWII German torpedo

==Mathematics, physics and chemistry==
* [[Soyuz T-1]], a 1979 space mission
* [[T1 space|T<sub>1</sub> space]], a topological space satisfying the T<sub>1</sub> separation axiom
* <math>\mathbb{T}^1</math>, the 1-[[torus]]
* [[Spin–lattice relaxation]] time in nuclear magnetic resonance and magnetic resonance imaging

==Sports==
* [[T1 (classification)]], a para-cycling classification
* [[T1 (esports)]], a South Korean esports team
* [[T1 League]], a Taiwanese men's professional basketball league

==Arts, entertainment, media==
* ''[[The Terminator]]'', the 1984 first film in the ''Terminator'' franchise, predecessor to 1991's ''T2: Judgment Day''
* [[Trainspotting (film)|''Trainspotting'' (film)]], 1996 film, predecessor to 2017's ''T2 Trainspotting''
* [[T1 (album)|''T1'' (album)]], 2018 album by Tatianna
* [[Tekken (video game)|''Tekken'']] (T1, Tekken 1), a 1994 fighting game, first entry in the videogame series
* [[module T1]], a ''Dungeons & Dragons'' add-on module

==Other uses==
* [[T1 General]], a tax form used in Canada
* [[T-1 visa]], allowing victims of human trafficking to remain in the United States
* T1, a tornado intensity rating on the [[TORRO scale]]
* [[T1 (Torx)]], size 1 for Torx screwheads
* [[T+1]], "trade date plus one day" in financial markets
* [[Tyler1]], an American internet personality and streamer on Twitch

==See also==
{{canned search|T1|T-1|T1's|T1s}}
* T1S, networking standard for single twisted-pair transmission; see [[Ethernet over twisted pair]]
* {{intitle|T-1}}
* {{intitle|T1}}
* [[TL (disambiguation)]]
* [[TI (disambiguation)]]
* [[1T (disambiguation)]]
* [[T (disambiguation)]]

{{Letter-Number Combination Disambiguation}}