LT

• Ladytron, a British electronic band
• Living Things (Linkin Park album), 2012
• Looney Tunes, theatrical cartoon series

• LTU International, a German airline (IATA code LT)
• Air Lituanica, a Lithuanian airline (IATA code LT)
• LJ Air, a Chinese airline (IATA code LT)
• Labour Together, a British think tank
• Larsen & Toubro, an Indian engineering conglomerate, officially known as L&T
• Life Teen, a Roman Catholic organization for youth ministry
• London Transport (brand), the name for various transport authorities
• Lord & Taylor, a North American luxury department store chain
• Lorien Trust, a company that runs live roleplaying games
• Lucent Technologies (old company), which merged with Alcatel to form Alcatel-Lucent

• Lawrence Tanter (1949-2026), Los Angeles Lakers announcer
• Lawrence Taylor, retired American football outside linebacker
• Lorna Tolentino (born 1961), Filipino actress with screen name L.T.
• LaDainian Tomlinson, retired American football running back

• Lithuania (ISO 3166 code)
  • Lithuanian language (ISO 639-1 code)
• Province of Latina, Italy (vehicle plate code)
• Long Trail, a footpath in the American state of Vermont

Biology and medicine

• Lactate threshold, a measurement used by athletes to determine the amount of strenuous work capable by their muscles
• Lymphotoxin, a cytokine
• Gallid alphaherpesvirus 1, the cause of infectious laryngotracheitis in poultry
• SV40 large T antigen, a proto-oncogene derived from polyomavirus SV40
• Heat-labile enterotoxin, a toxin produced by enterotoxigenic Escherichia coli
• Haplogroup LT, a Y-chromosome DNA haplogroup

Electronics and computing

• .lt, Internet country code top-level domain for Lithuania
• LaGrande Technology, former name for the Trusted Execution Technology (Intel's implementation of Trusted Computing)
• Left total, in sound recording, the left channel of the stereo Left total/Right total downmix
• Lightning Talk, a very short presentation lasting only a few minutes, given at a conference or similar forum.
• Linear Technology, manufacturer of integrated circuits
• Link Training, process by which the transmitter and receiver on a high-speed serial link communicate with each other in order to tune their equalization settings
• Logic Theorist, a computer program written in 1955–56 to prove mathematical theorems; called "the first artificial intelligence program"
• LanguageTool, an extension for many web browsers
• <, the HTML code for the less-than sign

Mathematics

• Laplace transform
• Less than
• Logic Theorist, a computer program written in 1955–56 to prove mathematical theorems; called "the first artificial intelligence program"
• Lorentz transformation

Vehicles

• LT, a type of London bus
• LT (car), an early Swedish automobile
• LT, a trim level for Chevrolet vehicles
• GM LT1 engine several engines by General Motors
• Lincoln Mark LT
• Volkswagen LT, a light truck
• McLaren 675LT, a British supercar
• Logistics Trainer, code name for the Lockheed F-117 Nighthawk stealth attack aircraft
• International LT, a Class 8 truck built by International which replaced the Prostar series

Other uses in science, technology, and mathematics

• La Tène culture, an archaeological culture
• Long ton, a unit of measurement

• Lead time, the latency between initiation and execution, as in supply chain management
• Left tackle, a position in American and Canadian football
• Lieutenant, sometimes abbreviated as Lt, Lt. Lieut, and similar
• Lisbon Treaty, a 2007 agreement amending the constitutional basis of the European Union
• Lithuanian language (ISO 639-1 code)
• Lithuanian litas (Lt), former currency of Lithuania, replaced by the Euro in 2015
• Local Time, in the context of time zones