| Abbreviation | Definition |
|---|---|
| CRN | Certified Radiology Nurse |
| CRNA | Certified Register Nurse Anesthetist |
| CRNA | Certified Registered Nurse Anaesthetic |
| CRNA | Certified Registered Nurse Anesthetists |
| CRP | Certificate of Rent Paid |
| CRP | Certified Reconditioned Parts |
| CRP | Certified Risk Professional |
| CRPM | Certified Recovery Program Manager |
| CRPM | Certified Remodeling Project Manager |
| CRPM | Certified Remodeling Project Managers |
| CRPM | Certified Residential Property Manager |
| CRRA | Certified Rate of Return Analyst |
| CRRA | Certified Recovery Residence Administrator |
| CRRT | Certified Respiratory Therapy Technician |
| CRS | Certified Residential Specialists |
| CRSE | Certified Racquet Sports Executive |
| CRSP | Certified Retirement Services Professional |
| CRSS | Certified Recovery Support Specialist |
| CRST | Certified Refrigeration Service Technician |
| CRT | Certification Review Team |