Organizations
- CT (company), a registered agent firm
- Canadian Tire, a Canadian company engaged in retailing, financial services and petroleum
- Calgary Transit, the public transit service in Calgary, Alberta, Canada
- Central Trains, a former train operating company in the United Kingdom
- Česká televize (CT), the public television broadcaster in the Czech Republic
- Malayan Races Liberation Army, which was referred to as "Communist Terrorists" or "Charlie Tango" by the British during the Malayan Emergency
- Conister or sometimes "Conister Trust, an Isle of Man-based financial institution.
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