CTC

• Central Texas College, in Killeen, Texas, U.S.
• Chattahoochee Technical College, Marietta, Georgia, U.S.
• Cincinnati Technical College, later Cincinnati State Technical and Community College, Cincinnati, Ohio, U.S.
• City Technology College, a type of school in England
• Career and Technology Centre, Calgary, Alberta, Canada
• Cornell Theory Center, predecessor to Cornell University Center for Advanced Computing, U.S.

• CTC (TV station), a television station in Canberra, Australia
• CTC Media, a Russian independent broadcasting company
• Calcutta Tramways Company, India
• Cambridge Temperature Concepts, a British company
• Canadian Tire, stock ticker CTC
• CBS Technology Center, the research and development organization of the CBS TV network
• Ceylon Tobacco Company, Sri Lanka
• Chiba Television Broadcasting Corporation, Japan
• Computer Terminal Corporation, later Datapoint
• Crimson Trace Corporation, an American company
• Itochu Techno-Solutions, a Japanese company
• The Contemporary Theater Company, in Rhode Island, U.S.

• California Transportation Commission, U.S.
• Canadian Tourism Commission, later Destination Canada
• Canadian Transport Commission
• Clermont Transportation Connection, Clermont County, Ohio, U.S.
• Combating Terrorism Center, an American academic institution
• Counter Terrorism Command, of the London Metropolitan Police
• Counterterrorism Center, now Counterterrorism Mission Center, of the CIA
• United Nations Security Council Counter-Terrorism Committee

• Carbon tetrachloride, a halomethane
• Centralized traffic control, a form of railway signalling
• Circulating tumor cell, in the blood
• Closed timelike curve, in general relativity
• Common Toxicity Criteria, later Common Terminology Criteria for Adverse Events, of cancer drugs
• Connectionist temporal classification, a type of neural network output
• Counter/timer channel, a peripheral for the Zilog Z80 microprocessor

• Central Texas Conference, an American junior college athletic conference with member schools located in Texas that operated from 1933 to 1939
• Cryme Tyme Cenation, a wrestling stable
• Cyclists' Touring Club, also known as Cycling UK
• Royal Calcutta Turf Club, a horse racing organisation

• CTC (band), a Romanian hip hop band
• Canadian Tire Centre, a multi-purpose indoor arena in Ottawa, Ontario, Canada
• Canberra Theatre Centre, a performing arts centre in Canberra, Australia
• Central de Trabajadores de Cuba, the Workers' Central Union of Cuba
• Centro de Tratamento de Correspondência, letter centre of Post of Portugal
• Centre for Terrorism and Counterterrorism, now Institute of Security and Global Affairs (ISGA), The Hague, Netherlands
• Child tax credit, a tax credit for parents with dependent children
• Cinnamon Toast Crunch, a brand of breakfast cereal
• Combat Team Conference, a competition of military and law enforcement special operations units
• Common Transit Convention, a transport treaty of the European Union
• Communities That Care, program of the U.S. Center for Substance Abuse Prevention
• Confederación de Trabajadores de Colombia, the Confederation of Workers of Colombia
• Continuous transaction control, a method of data collection of governmental bodies
• Cost to company, the total salary package of an employee
• Cracking the Cryptic, a YouTube channel dedicated to paper-and-pencil puzzles
• Crush, tear, curl, a method of processing tea

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