| Cambridge Crystallographic Data Centre | Academic & Science |
| Caribbean Coastal Data Centre | Academic & Science |
| Cyclic Channel Die Compression | Academic & Science |
| Cordillera Career Development Center | Business |
| Catoctin Creek Distilling Company | Business |
| City Contemporary Dance Company | Business |
| Concorde Career Colleges | Business |
| Commercial Chemical and Development Company | Business |
| Chesterfield Community Development Corporation | Business |
| Centre City Development Corporation | Business |
| Consultant in Communicable Disease Control | Business |
| Child and Career Development Center | Business |
| Capital City Development Corporation | Business |
| Community Capital Development Corporation | Business |
| Clarksville Community Development Corporation | Business |
| Center City Development Corporation | Business |
| Cordillera Career Development College | Business |
| Clemson Child Development Center | Community |
| Convention Center Development Corporation | Community |
| Canaan Community Development Corporation | Community |
| Christian Child Development Center | Community |
| Covenant Child Development Centers | Community |
| Coastside Child Development Center | Community |
| Combat Capabilities Development Command | Community |
| Community College of the District of Columbia | Community |
| Curating Community Digital Collections | Community |
| Chinese Control and Decision Conference | Community |
| Cluster Community Development Council | Community |
| Coppell Child Development Center | Community |
| Chester County Democratic Committee | Community |
| Capital City Development Corp | Community |
| Child Care and Develpmnent Center | Community |
| Cambridge Child Development Centre | Community |
| Caribbean Child Development Centre | Community |
| Capitol Child Development Center | Community |
| Community Child Development Center | Community |
| Chinatown Community Development Center | Community |
| Collegiate Cyber Defense Competition | Computing |
| Cairo Contemporary Dance Center | General |
| Covert Communications Data Capture | General |
| City Center DC in case | General |
| Cambridge Crystallographic Data Center | General |
| Charity Car Donation Center | General |
| Continuous Change Detection and Classification | General |
| Certified Chemical Dependency Counselor | General |
| Circuit Court of the District of Columbia | Governmental |
| Canadian Construction Documents Committee | Governmental |
| Clark County Detention Center | Governmental |
| Chinese Center for Disease Control | Medical |
| Centre for Complete Dental Care | Medical |
| Colorado Cross Disability Coalition | Medical |
| Consultants in Communicable Disease Control | Medical |
| Canadian Communicable Disease Center | Regional |
| Columbus County Detention Center | Regional |
| Computer Communication in Developing Countries | Regional |
| Canadian Construction Document Committee | Regional |
| Canadian Construction Document Committiee2 | Regional |
| Campbell County Detention Center | Regional |
