| Abbreviation | Definition |
|---|---|
| RMD | Research and Market Development |
| RME | Registered Mechanical Engineer |
| RME | Responsible Management Employee |
| RMN | Registered Mental Nurse |
| RMO | Responsible Managing Officer |
| RMT | Registered Massage Therapist |
| RN | Registered Nurse |
| RN | Resident Nurse |
| RNC | Registered Nurse Certified |
| RNFA | Registered Nurse First Assistant |
| RNMH | Registered Nurse for the Mentally Handicapped |
| RNO | Recruitment Networking Online |
| RNR | Royal Naval Reserve |
| RO | Resource Operator |
| RO | Returning Officer |
| ROF | Registered Orthotic Fitter |
| ROG | Really Old Guy |
| ROI | Rate Of Income |
| RON | Really Outgoing Niceguy |
| ROP | Regional Occupation Program |