| Centre for Studies of Developing Societies | Academic & Science |
| Cluster Science Data System | Academic & Science |
| Center for Spatial Data Science | Academic & Science |
| Comparative Studies in Discourse and Society | Academic & Science |
| Chemical Safety Data Sheet | Academic & Science |
| Communicative Sciences and Deaf Studies | Academic & Science |
| Charlottesville Swing Dance Society | Academic & Science |
| Centre for the Study of Developing Societies | Academic & Science |
| Certified Secure Destruction Specialist | Business |
| Certified Secure Destruction Specialists | Business |
| Casino Data Systems | Business |
| Council-certified Structural Drying Supervisor | Business |
| Centre for Sustainable Development Studies | Community |
| Center for Social Development Studies | Community |
| Clinical Skills Development Service | Community |
| Comprehensive Service Delivery System | Community |
| Collaborative Standards Development System | Community |
| Community Services Data Set | Community |
| Circuit Switched Data Services | Computing |
| Computer Science Decision Systems | Computing |
| Computer Science and Decision Systems | Computing |
| Center for Sustainable Design Strategies | General |
| Center for Strategic Deterrence Studies | General |
| Command Ship Data System | General |
| California Surveying and Drafting Supply | General |
| Client Status Discovery Service | General |
| Coating System Data Sheet | General |
| Centre for Security and Defense Studies | General |
| Center for Strategic and Diplomatic Studies | General |
| Center Stage Dance Studio | General |
| Center for Secure and Dependable Systems | General |
| Cooperative Services Desktop Support | General |
| Ceder Square Dance System | General |
| Center for Spirituality Dialogue and Service | General |
| Center for Stroke Disparities Solutions | General |
| Common Sense Deficiency Syndrome | Medical |
| Canadian Society for Dermatologic Surgery | Regional |
