| Clark Electric Distribution Corporation | Academic & Science |
| Civil Engineering Design Consultants | Academic & Science |
| Certified Emergency Department Coder | Business |
| Central European Distributors Corporation | Business |
| Community Economic Development Corporations | Community |
| Community Enterprise Development Corporation | Community |
| Cumberland Economic Development Corporation | Community |
| Cabrillo Economic Development Corporation | Community |
| Center for Educational Design and Communication | Community |
| Community and Economic Development Clinic | Community |
| Coastal Economic Development Corporation | Community |
| Community Economic Development Center | Community |
| Community and Economic Development Committee | Community |
| Community Enhancement Development Corporation | Community |
| Community Economic Development Commission | Community |
| Community Education and Dissemination Council | Community |
| Columbia Economic Development Corporation | Community |
| Common Enterprise Development Corporation | Community |
| Collegeville Economic Development Corporation | Community |
| Changan European Design Center | General |
| Cambridge Eating Disorder Center | General |
| Chatham Economic Development Corporation | Governmental |
| Classroom Energy Diet Challenge | Governmental |
| Cycling Error Detection Code | Governmental |
| Cowlitz Economic Development Council | Governmental |
| Central European Defence Cooperation | Regional |
| Central European Development Corporation | Regional |
| Central European Distribution Corporation | Regional |
| Clemson Engineers for Developing Countries | Regional |
