| CDDC | Canberra Dance Development Centre 
| Others |
| CDDC | Canberra District Ducati Club
| Others |
| CDDC | Cargo Data Declaration Charge
| Others |
| CDDC | Carolyn Dorfman Dance Company
| Others |
| CDDC | Cell Differentiation and Development Center
| Others |
| CDDC | Center for Digital Discourse and Culture
| Others |
| CDDC | Centre de Documentation sur le Dommage Corporel
| Others |
| CDDC | Collaboratory for Digital Discourse and Culture
| Others |
| CDDC | Colorado Developmental Disabilities Council
| Others |
| CDDC | Columbus Downtown Development Corporation
| Others |
| CDDC | Comprehensive Digestive Disease Center
| Others |
| CDDC | County Durham Development Company
| Others |