Critical Thinking

Closet Trekkie, the secret loving of the TV franchise, Star Trek

Central African Republic (via FIPS Pub 10-4 code and obsolete NATO digram)

Counter-Terrorists, One of the two possible teams in the popular game Counter-Strike.

Combustion turbine, a rotary engine that extracts energy from a flow of combustion gas

Computed tomography, a.k.a. CAT scan, a medical imaging method

Cape Town, the legislative capital of South Africa

Chrono Trigger, a console role-playing game created by Square for the Super NES

Cognitive therapy

Catania, the capital city of the province of Catania, in Sicily, Italy

Cody Travers, a video game character

Canadian Tire, one of Canada's largest publicly traded companies and operates an inter-related network of businesses engaged in retailing, financial services and petroleum.

Central Trains, a former train operating company in the United Kingdom

Central Time zone, a time zone in Canada, the United States, and Mexico

Cryme Tyme, a professional wrestling stable working for WWE's RAW brand

Calgary Transit, the public transit service in Calgary, Alberta, Canada

Česká televize (ČT), the public television broadcaster in the Czech Republic

Civil Air Transport IATA code

CT, the largest registered agent firm in the world.

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.

Center tap, a wire that is connected halfway along one of the windings of a transformer, inductor or a resistor

Transparency (optics) (see-through)

Centime (ct), French for "cent", used in English in several Francophone countries

Cardiothoracic Surgery, the field of medicine specializing in chest surgery

c't, a German computer magazine, standing for "Computer Technik"

Cool-Teens is a large teen community on the internet dedicated to discussing issues which confront teenagers on a day to day life, sexuality, health and development, school and work, and family life. Religious, political and current event debates are...

Cryptologic technician, a United States Navy enlisted rating or job specialty

Convective temperature

Canton and Enderbury Islands (via obsolete ISO 3166 country code), part of the Phoenix Islands in the Pacific Ocean

Circadian Time, A time point at a chronobiological experiment; Cf. ZT, Zeitgeber Time, in experiments with constant darkness conditions.

Champions Trophy

Crazy Taxi, a driving video game for multiple platforms. Also includes the series of the same name.

Crawler-transporter, a tracked vehicle used to transport the Space Shuttle from VAB to Launch Complex 39.

Current transformer, a special kind of transformer used in the electrical power industry

Intel Ct, a SIMD `Multithreading programming model developed by Intel.

Communist Terrorists (also "Charlie Tango") - a term used by the British during the Malayan Emergency to refer to the Malayan Races Liberation Army.

Connecticut, via United States postal abbreviation