| Abbreviation | Definition |
|---|---|
| CDTC | Capital Dog Training Club |
| CDTC | Charlotte Dog Training Club |
| CDTD | Club der toten Dichter |
| CDTD | Clubs der toten Dichter |
| CDTN | Clube Desportivo de Torres Novas |
| CDU | Club deutscher Unternehmer |
| CDUC | Club Deportivo Universidad Católica |
| CDV | Club Der Visionaere |
| CDVG | Clube Desportivo Velha Guard |
| CDYC | Chepstow and District Yacht Club |
| CEASO | Club Entreprises Angers Sud Orgemont |
| CECC | Columbia Edgewater Country Club |
| CEEAC | Colby Energy and Environmental Alumni Club |
| CEFT | Club Des Escrimeurs De Faches Thumesnil |
| CEHB | Club Ecole Havrais de Billard |
| CEME | Club Esportiu Mossos d'Esquadra |
| CEP | Club Excellence Process |
| CERC | Columbus Eastside Running Club |
| CESET | Club Esportiu Santa Eug??nia de Ter |
| CESET | Club Esportiu Santa Eugènia de Ter |