CT
- CT – (i) Computed tomography (medical scan also known as a CAT scan) – Central Time zone – Chrono Trigger (Computer/Video games) – (s) Connecticut (postal symbol) – Canterbury (postal symbol) – Chhatisgarh (Indian state code)
- CTA
- (s) Central African Republic (FIFA trigram, but not ISO 3166 or IOC)
- (i) Chicago Transit Authority
- (i) Comando-Geral de Tecnologia Aerospacial (Portuguese, "General Command for Aerospace Technology")
- CTBT – (i) Comprehensive Test Ban Treaty
- CTC – (i) Closed Timelike Curve (relativity) – (U.S.) Combat Training Center
- CTDB – (i) Compact Terrain Data Base (file format)
- CTE
- (s) Canton and Enderbury Islands (ISO 3166 trigram; obsolete 1984)
- (i) Chronic traumatic encephalopathy
- CTGF – (i) connective tissue growth factor
- CTI – (i) Co-operative Target Identification
- CTIL – (i) Critical Tracked Items List
- CTIS – (i) Central Tire Inflation System
- CTMS – (i) Clinical Trial Management System
- CTO – (i) Chief Technical Officer – Chief Technology Officer
- CTS – (i) Clear-To-Send – Collective Training Standards – Communications Technology Service – Contract Technical Services – Conversation Time Sharing – COSMIC Top Secret
- CTSS – (i) Compatible Time-Sharing System
- CTU – (i) Counter Terrorist Unit (fictional branch of the Central Intelligence Agency in the television action series 24)
- CTVT – (i) Canine Transmissible Venereal Tumour
Read more about this topic: List Of Acronyms And Initialisms: C