| Certified Ceramic Tile Specialist | Business |
| Certified Ceramic Tile Salesperson | Business |
| Certified Corporate Trust Specialist | Business |
| Certificate in Clinical and Translational Science | Business |
| Classical Christian Tutorial Services | Community |
| Community College Transfer Services | Community |
| Classical Christian Tutorial Service | Community |
| Camden County Technical Schools | Community |
| Center for Community Technology Services | Community |
| Castlemont Community Transformation Schools | Community |
| Combat Crew Training School | Community |
| Computer Controlled Testing System | Computing |
| Commissioner for Complaints for Telecommunications Services | Computing |
| Call Center Test System | Computing |
| Configuration Control Tracking System | General |
| Creative Critical Thinking and Study | General |
| Cross Continental Transmit System | General |
| Carbon Credits Total Supply | General |
| Creative Critical Thinking Shift | General |
| Conditional Cash Transfer Scheme | General |
| Core Component Technical Specification | General |
| Capitol Complex Telephone System | General |
| Center for Change in Transition Services | General |
| Central Change and Transport System | General |
| Combat Crew Training Squadron | General |
| Commission for Complaints for Telecom-television Services | Governmental |
| Cabarrus County Transportation Services | Governmental |
| Close Combat Training System | Governmental |
| Commissioner for Complaints for Telecommunications Services (Canada) | Governmental |
| Committee on Clinical and Translational Science | Medical |
| Center for Clinical Translational Sciences | Medical |
| Current Challenges in Thoracic Surgery | Medical |
| Center for Clinical and Translational Sciences | Medical |
| Collaborative Corneal Transplantation Studies | Medical |
