| Abbreviation | Definition |
|---|---|
| CCNA | Cisco Certified Network Administrator |
| CCNE | Cisco Certified Network Engineer |
| CCOA | Corporate Certified Ophthalmic Assistant |
| CCOM | CIAC (Call-center Industry Advisory Council) Certified Operations Manager |
| CCP | Certified Credit Professional |
| CCRP | Certified Clinical Research Professional |
| CCSP | Certified Chiropractic Sports Physician |
| CD | Canadian Forces Decoration |
| CD | Certified Director |
| CDA | Candidate Development Award |
| CDA | Career Development Award |
| CDA | Certified Dental Assistant |
| CDCS | Certified Documentary Credit Specialist |
| CDI | Certified Deaf Interpreter |
| CDL | Certified Dock Loader |
| CDMP | Certified Data Management Professional |
| CDMP | Certified Disability Management Professional |
| CDMS | Certified Disability Management Specialist |
| CDT | Certified Derma-Technician |
| CEAP | Certified Employee Assistance Professional |