T4 or T-4 may refer to:

Airports and airlines

  • Heathrow Terminal 4
  • Tiyas Military Airbase, also known as the T-4 Airbase

Biology and medicine

  • T4 phage, a bacteriophage
  • Thyroxine (T<sub>4</sub>), a form of thyroid hormone
  • T4 or thoracic spinal nerve 4
  • the fourth thoracic vertebrae of the vertebral column
  • A non-small cell lung carcinoma staging for a type of tumour
  • A CD4 + T lymphocyte
  • T4: an EEG electrode site according to the 10-20 system
  • T<sub>4</sub>, a tumor class in the TNM staging system

Entertainment

  • T4 (Channel 4), the former daytime teen-aimed slot on Channel 4 in the UK
  • Terminator Salvation, sometimes referred to as Terminator 4
  • Transformers: Age of Extinction, the fourth film in the live-action Transformers film series

Software and video games

  • Text Template Transformation Toolkit, a technology developed by Microsoft
  • Tekken 4, a 2001 fighting game

Rail transport

  • Eastern Suburbs & Illawarra Line, a Sydney Trains railway service
  • Île-de-France tramway Line 4
  • T4 (Istanbul Tram)

Vehicles

  • Dayton-Wright T-4, a 1918 American light, single-seat reconnaissance aircraft
  • Kawasaki T-4, a Japanese aircraft
  • Soyuz T-4, a space mission
  • Sukhoi T-4, a Soviet aircraft
  • Tatra T4, a 1967 Czechoslovak tram
  • Thaden T-4, a 1930s American four-seat all-metal cabin monoplane
  • Troller T4, a Brazilian off-road vehicle
  • Volkswagen Transporter series IV van
  • a model of the OS T1000 train of the Oslo Metro
  • Model T4 Cunningham experimental armored car, later the M1 Armored car

Weapons and explosives

  • T-4 Atomic Demolition Munition, a small tactical nuclear bomb
  • G7e/T4, a Falke German torpedo
  • The Italian name for the high explosive RDX

Other uses

  • Great East Road, a road in Zambia
  • T4 road (Tanzania), a road in Tanzania
  • Lockheed Martin's High beta fusion reactor prototype, called T4
  • A T4 slip, a tax return form used in income taxes in Canada
  • Aktion T4, Nazi Germany's mass-murder of the mentally and physically disabled
  • Normal space in topology
  • Version 4 of Traveller role-playing game
  • T4, one of several fluorescent-lamp formats
  • A tornado intensity rating on the TORRO scale
  • SPARC T4, a microprocessor introduced by Oracle Microelectronics in 2011

See also

  • The Four T's (disambiguation)
  • 4T (disambiguation)
  • TTTT
  • Type 4 (disambiguation)