The IATA airline code for Hellas JetMadrid Barajas Airport Terminal 4London Heathrow Airport Terminal 4
In biology and medicine
T4 phage, a bacteriophageThyroxine (T), a form of thyroid hormonesthe T4 spinal nervethe fourth thoracic vertebrae of the vertebral columnA non-small cell lung carcinoma staging for a type of tumour
In entertainment
T4 (Channel 4), the weekend daytime teen-aimed slot on Channel 4 in UKTerminator Salvation, sometimes referred to as Terminator 4
In Computer Hardware
SPARC T4, a microprocessor introduced by Oracle Microelectronics in 2011
In software and video games
Text Template Transformation Toolkit, a technology developed by MicrosoftTekken 4, a fighting game
Vehicles
Dayton-Wright T-4, a 1918 American light, single-seat reconnaissance aircraftKawasaki T-4, a Japanese aircraftSoyuz T-4, a spatial missionSukhoi T-4, a Soviet aircraftTatra T4, a 1967 Czechoslovakian tramThaden T-4, a 1930s American four-seat all-metal cabin monoplaneVolkswagen Transporter series IV vana model of the OS T1000 train of the Oslo Metro
Weapons and explosives
T-4 Atomic Demolition Munition, a small tactical nuclear bombG7e/T4, a Falke German torpedoThe Italian name for the high explosive RDX
Other
A T4 slip, a tax return form used in income taxes in CanadaAction T4, a Nazi Germany "euthanasia" programNormal space in topologyParis Tramway Line 4the version 4 of Traveller role-playing game
