CT

CT or ct may refer to:

Science and technology

Carat (purity) (ct), a measure of the purity of gold and platinum alloys
Carat (mass) (ct), a unit of mass used for measuring gems and pearls
Certificate transparency, in network security
Continuous-time signal, a varying quantity (a signal) whose domain is a continuum
Chemotype (ct.)
Intel Ct, a SIMD multithreading programming model developed by Intel
Center tap, a wire that is connected halfway along one of the windings of a transformer, inductor or a resistor
Current transformer, a kind of transformer used in the electrical power industry
Convective temperature, in atmospheric science
CT Value, in drinking water disinfection
Ct ligature, a typographic ligature

CT postcode area, for Canterbury and surrounding areas in south-eastern England
Connecticut (United States postal abbreviation)
Province of Catania (vehicle registration code), Sicily, Italy
Central African Republic (FIPS Pub 10-4 code and obsolete NATO diagram)
Canton and Enderbury Islands (obsolete ISO 3166 country code), part of the Phoenix Islands in the Pacific Ocean

CT (company), an umbrella brand for two businesses: CT Corporation and CT Liena
Canadian Tire, a Canadian company engaged in retailing, financial services and petroleum
Calgary Transit, the public transit service in Calgary, Alberta, Canada
Central Trains (National Rail abbreviation), a former train operating company in the United Kingdom
Česká televize, the public television broadcaster in the Czech Republic
Community Transit, the public transit service in Snohomish County, Washington, U.S.

Centime (ct), the French for "cent", used in English in several Francophone countries
Stotinki (ст), the currency of Bulgaria

Lexus CT, an automobile
Honda CT series, a series of Honda bikes
Crawler-transporter, a tracked vehicle used to transport the Space Shuttle from Vehicle Assembly Building to Launch Complex 39
Civil Air Transport (IATA code)
Training cruiser (U.S. Navy hull classification)

Central Time Zone, a time zone in Canada, the United States, and Mexico
c. t. (cum tempore, Latin for "with time") indicates that a lecture will begin a quarter-hour after the stated time; see Academic quarter
Cryptologic technician, a United States Navy enlisted rating or job specialty
Compliant tower, a deepwater offshore oil platform
Conspiracy theory or theorist
c't (Computer Technik), a German computer magazine
Freelancer Agent Connecticut, one of the Red vs. Blue characters who often goes by the moniker of C.T.