CTS
- CTS (rocket stage)
- CTS Education and Culture
- CTS Main Channel
- CTS News and Info
- CTS Recreation
- Cadillac CTS
- Cambridge Tolkien Society
- Car Top Systems
- Cardiothoracic surgery
- Carpal tunnel syndrome
- Cathepsin
- Catholic Truth Society
- Cattle Tracing System
- Certificate in Theological Studies (CTS) at Divine Word Seminary
- Channel 44 (Adelaide)
- Chicago Theological Seminary
- China Travel Service
- Chinese Television System
- Christian Television System
- Christian Theological Seminary
- Christmas Tree Shops
- Ciphertext stealing
- Clear to send (disambiguation)
- Cognizant Technology Solutions
- College of Technological Sciences–Cebu
- Colorado Time Systems
- Columbia Theological Seminary
- Combat Zones That See
- Common Type System
- Compagnie des Transports Strasbourgeois
- Computational transportation science
- Concordia Theological Seminary
- Conflict Tactics Scale
- Connexxion Taxi Services
- Consider the Source
- Copper tubing
- Cosmic Top Secret
- Country Television Services
- Crack the Skye
- Cracked tooth syndrome
- Crossroads Television System
- Hermes Communications Technology Satellite
- Iraqi Counter Terrorism Service
- List of United States Air Force training squadrons
- NASCAR Craftsman Truck Series
- New Chitose Airport
- Pandan Bikol language
- The Calcutta Technical School
- The Catherine Tate Show
- Ulnar nerve entrapment