CCU
- California Coast University
- Cambodian Confederation of Unions
- Camera control unit
- Carbon capture and utilization
- Chaudhary Charan Singh University
- Chinese Culture University
- Cincinnati Christian University
- Coastal Carolina University
- Colorado Christian University
- Common Cold Unit
- Commonwealth Credit Union
- Compañía de las Cervecerías Unidas
- Concurrent user
- Confederation of Canadian Unions
- Coronary care unit
- Correctional Custody Unit
- Critical care unit
- Customer Configuration Updating
- National Chengchi University
- National Chung Cheng University
- Netaji Subhash Chandra Bose International Airport