| Abbreviation | Definition |
|---|---|
| RNAO | Registered Nurses Association of Ontario / l’Association des infirmières et infirmiers autorisés de l’Ontario (licensing body) |
| RNAO | Registered Nurses Association of Ontario / lAssociation des infirmières et infirmiers autorisés de lOntario (licensing body) |
| RNTA | Royal Navy Theatre Association |
| RNTA | Royal Netherlands Tuberculosis Association |
| ROAD | Resolve Outlook Association And Disposition |
| ROEC | Romania Energy Center |
| ROGE | Restructuring of the Global Economy |
| RONA | River Oaks Neighborhood Association |
| ROSA | Rickmansworth Old Students Association |
| RPA | Retirement Plans Associate |
| RPA | Robotic Process Automation |
| RPA | The Role Players Association |
| RPEQ | Registered Professional Engineer Queensland |
| RPFANS | Registered Professional Foresters' Association of Nova Scotia |
| RPFNL | Registered Professional Foresters of Newfoundland and Labrador |
| RPL | Registered Petroleum Landman |
| RPR | REALTORS Property Resource |
| RPSGB | Royal Pharmaceutical Society of Great Britain |
| RQB | Recognized Qualifying Body |
| RQG | Register of Qualified Genealogists |