T1

T1, T01, T.1 or T-1 may refer to:

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, a fungal endonuclease
 * TNM staging system, classification for a small cancer tumor

Computing

 * Apple T1, a system on a chip used by Apple
 * T1 font, or cork encoding, a character encoding
 * T1, a component of the T-carrier system for telecommunication
 * UltraSPARC T1, a microprocessor
 * AYYA T1, a smartphone developed by Rostec as part of the Ayya (smartphone) line

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
 * Sopwith Cuckoo, a British biplane torpedo bomber of 1918

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
 * 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
 * North Shore & Western Line, a commuter rail line in Sydney, Australia
 * Île-de-France tramway Line 1, a.k.a. T1, a tramway near Paris, France
 * 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 Czechoslovakian tramcar
 * T1 (Istanbul Tram), a tram line in Istanbul, Turkey
 * Nakano Station (Tokyo), station number T-01 in Tokyo Metro Tozai Line

Roads

 * T1 road (Zambia), a road in Zambia
 * T1 road (Tanzania), a road in Tanzania

Ships

 * USS T-1, several United States Navy ships
 * HMNZS Matai (T01), a Royal New Zealand Navy lighthouse tender of 1941
 * MV Transpacific (T-1), a 1992 US oil tanker
 * 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

 * T1 Bristol–Thornbury, a bus route in England

Tanks and weapons

 * T1 Light Tank, a U.S. prototype tank
 * 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

 * T1 Aquarii, a star
 * T1 Carinae, a star
 * Soyuz T-1, a 1979 space mission
 * T1 space, a topological space satisfying the T1 separation axiom
 * $$\mathbb{T}^1$$, the 1-torus
 * Spin–lattice relaxation time in nuclear magnetic resonance and magnetic resonance imaging

Products

 * vivo T1 series, the 5 smartphones manufactured by Vivo Communication Technology Co.

Other uses

 * The Terminator, the first film in the Terminator franchise
 * T1 (album), 2018 album by Tatianna
 * T1 (classification), a para-cycling classification
 * T1 General, a tax form used in Canada
 * T-1 visa, allowing victims of human trafficking to remain in the United States
 * Tour T1, an office skyscraper in La Défense, Paris, France
 * T1 Mall of Tallinn, shopping and entertainment centre in Tallinn, Estonia
 * Estonian national road 1, officially T1, connecting Tallinn and Narva
 * T1 (esports), Korean esports team.
 * Target One, a Mesoamerican archaeological site in Honduras
 * T1, a tornado intensity rating on the TORRO scale
 * T+1, "trade date plus one day" in financial markets
 * Tekken, a 1994 fighting game
 * Tyler1, an American internet personality and streamer on Twitch
 * T1 League, a Taiwanese men's professional basketball league