| Center for Computer Aided Design, University of Iowa | Academic & Science |
| Columbus Colllege of Art and Design | Academic & Science |
| Canadian Committee on Archival Description | Academic & Science |
| Columbus College of Art and Design | Academic & Science |
| Columbus College of Art Design | Academic & Science |
| Chelsea College of Art and Design | Academic & Science |
| Corcoran College of Art and Design | Academic & Science |
| Civil Consulting and Design | Business |
| Closed Caption & Audio Description | Business |
| Center for Child and Adolescent Development | Community |
| Community Care for Aged Disabled | Community |
| Center for Computer Aided Design | Computing |
| Cleveland College of Art and Design | Educational Institute |
| Clariscad Data | File Type |
| Collins Cobuild Advanced Dictionary | General |
| Collector Car Appreciation Day | General |
| Customer Correlated Accelerated Durability | General |
| Collin Central Appraisal District | General |
| Casual Chic Attire Disorder | General |
| Chest Cage Angle Difference | General |
| Central California Area Derby | General |
| Comisión Centroamericana de Ambiente y Desarrollo | Governmental |
| Canadian Conservation Areas Database | Governmental |
| Central Cardiac Audit Database | Medical |
| Chronic Cold Agglutinin Disease | Medical |
| Critical Coronary Artery Disease | Medical |
| Cleveland Clinic Abu Dhabi | Medical |
| Corpus Christi Army Depot | Military and Defence |
| Collin County Appraisal District | Regional |
| Conceptual Computer Aided Design | Softwares |
