| Chemical Control and Management Centre | Academic & Science |
| Commission for Case Management Certification | Business |
| Certified Career Management Coach | Business |
| CEN CENELEC Management Centre | Business |
| Crystal Coast Management Consultants | Business |
| Ciac Certified Management Consultant | Business Management |
| California Casualty Management Company | Business Management |
| Commission for Case Manager Certification | Certifications |
| Compliance and Certification Managers Committee | Certifications |
| Crazy Catie Music Corp | Community |
| Committee on the Costs of Medical Care | Community |
| Cultural Council for Monterey County | Community |
| Chicago Community Mennonite Church | Community |
| Center for Chinese Music and Culture | Community |
| Catholic Charities of Monroe County | Community |
| Cyprus Community Media Centre | Community |
| Crowden Center for Music in the Community | Community |
| Community Coordinated Modeling Center | Community |
| Communications Consortium Media Center | General |
| Certicate Cource of Maritime Catering | General |
| Committee of Common Market Automobile Constructors | General |
| Central Carolina Mopar Club | General |
| Corvette Club of Marion County | General |
| Comite des Constructeurs d'Automobile du Marche Commun | General |
| Cross Country Motor Club | General |
| Causeway Coast Mini Club | General |
| Canadian Construction Materials Centre | General |
| Ceramic And Composite Materials Center | General |
| California Clean Money Campaign | General |
| Customer Care Measurement Consulting | General |
| Capital City Men's Chorus | General |
| Center for Capital Markets Competitiveness | General |
| California Coast Music Camp | General |
| Culver City Municipal Code | Governmental |
| Coimbatore City Municipal Corporation | Governmental |
| Canadian Construction Materials Centre (part of NRC) | Governmental |
| Comité des Constructeurs du Marché Commun | International |
| Clinton County Medical Center | Medical |
| Cebu City Medical Center | Medical |
| Comanche County Medical Center | Medical |
| Connecticut Children's Medical Center | Medical |
| Cross Country Mic Controllers | Networking |
| Canadian Construction Materials Center | Regional |
| Conseil Consultatif Maritime Canadien | Regional |
| Canadian Centre For Marine Communications | Regional |
