| Abbreviation | Definition |
|---|---|
| CNC | Clinical Nurse Consultant |
| CNC | Communications and Network Consulting |
| CNC | Communications Network Consulting |
| COBC | Central Ohio Behavioral Consulting |
| COCG | Charter Oak Consulting Group |
| CPA | Consulting Porsche Academy |
| CPCCH | Consultant Paediatricians in Community Child Health |
| CPIC | Certified Product Innovation Consultant |
| CPIS | Consultant Professional Information System |
| CPTC | Certified Penetration Testing Consultant |
| CRC | Casualty Risk Consulting |
| CRG | Consulting Resource Group |
| CRL | Consulting Radiologists Ltd |
| CRP | Consultant Replenishment Program |
| CS | Consulting Skill |
| CSCG | Civil Society Consulting Group |
| CSCP | Canadian Society of Consultant Pharmacists |
| CSCS | Cyprus Subsea Consulting and Services |
| CSCU | Cornell Statistical Consulting Unit |
| CSE | Consulting Specifying Engineer |