| CTSC | Cambridge Trading Services Corporation 
| Others |
| CTSC | Carrier Transicold of Southern California
| Others |
| CTSC | Center for Technology and School Change
| Others |
| CTSC | Center for Trustworthy Scientific Cyberinfrastructure
| Others |
| CTSC | Chenega Technology Services Corporation
| Others |
| CTSC | Classroom Technology Support Center
| Others |
| CTSC | Cleveland Technical Societies Council
| Others |
| CTSC | Clinical and Translational Science Center
| Others |
| CTSC | Clinical and Translational Science Collaborative
| Others |
| CTSC | Clinical and Translational Sciences Center
| Others |
| CTSC | Clinical Translational Science Center
| Others |
| CTSC | Clinical Trial Support Center
| Others |
| CTSC | Collaboration Technology Support Center
| Others |
| CTSC | Communications Technician (special Devices) Chief Petty Officer
| Others |
| CTSC | Community Television of Southern California
| Others |
| CTSC | Community Traffic Safety Coalition
| Others |
| CTSC | Continental Tire Sportscar Challenge
| Others |
| CTSC | Critical Thinkers Science Club
| Others |
| CTSC | Cross Training Sports Camps
| Others |