CT

CT or ct may refer to:

In arts and media

 * c't (Computer Technik), a German computer magazine
 * Freelancer Agent Connecticut (C.T.), a fictional character in the web series Red vs. Blue
 * Christianity Today, an American evangelical Christian magazine

Businesses and organizations

 * CT Corp, an Indonesian conglomerate
 * CT Corporation, an umbrella brand for two businesses: CT Corporation and CT Liena
 * C/T Group, formerly Crosby Textor Group, social research and political polling company
 * 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.
 * Comunión Tradicionalista, a former Spanish political party
 * CT (TV channel), a Filipino cable and satellite television network

Finance

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

Places

 * 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
 * Cape Town (capital city of the Western Cape, South Africa)


 * Ct, for "Court"; a street suffix as used in the US

Biology and medicine

 * Haplogroup CT, Y-DNA haplogroup.
 * CT scan or X-ray computed tomography, a medical imaging method
 * Calcitonin (symbol CT), a hormone produced in the thyroid gland
 * Calibrated automated thrombogram (CT or CAT), a coagulation test
 * Cardiothoracic surgery, the field of medicine specializing in chest surgery
 * Chemotype (ct.), a chemically distinct entity in a plant or microorganism
 * Cognitive therapy, a type of psychotherapy
 * Connective tissue, a type of biological tissue
 * Chelation therapy
 * Chemotherapy
 * Cholera toxin, a toxic protein secreted by Vibrio cholerae
 * Threshold Cycle (Ct), see cycle of quantification/qualification
 * COVID-19 test

Computing

 * Intel Ct, a SIMD multithreading programming model developed by Intel
 * Certificate Transparency, in network security

Other uses in science and technology

 * CT Value, in drinking water disinfection
 * Threshold cycle (Ct), a measure in the cycle of quantification/qualification of a real-time polymerase chain reaction
 * 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
 * Continuous-time signal, a varying quantity (a signal) whose domain is a continuum
 * Center tap, a wire that is connected halfway along one of the windings of a transformer, inductor or a resistor
 * Compliant Tower, a deepwater offshore oil platform
 * Convective temperature, in atmospheric science
 * Current transformer, a kind of transformer used in the electrical power industry

Transportation

 * 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, a U.S. Navy hull classification

Other uses

 * Ct, a typographic ligature
 * c. t. (cum tempore, Latin for "with time"), indicates that a lecture will begin a quarter-hour after the stated time; see Academic quarter
 * Central Time Zone, a time zone in Canada, the United States, and Mexico
 * Coffin Texts
 * Conspiracy theory or theorist
 * Counter-terrorism
 * Cryptologic technician, a United States Navy enlisted rating or job specialty
 * Chinese Taipei, the name used by Taiwan in some international organizations due to political pressure from the People's Republic of China
 * ct followed by a number means the number of items contained in a cardboard (e.g. zucchini 3 ct)
 * Corps Turd, etymologically "Cadet in Training", member of the Texas A&M Corps of Cadets that is not in the band