| Abbreviation | Definition |
|---|---|
| RLCN | Rugby League Conference National |
| RLDC | Regional Leadership and Development Conference |
| RLDC | Regional Leadership Development Conferences |
| RMAC | Rocky Mountain Athletic Conference |
| RMBS | Rocky Mountain Business Seminar |
| RMC | Real Man Conference |
| RMC | Reciprocal Meat Conference |
| RMC | Regional Ministers Conference |
| RMC | Revolt Music Conference |
| RMC | Risk Management Conference |
| RMCAE | Reliability & Maintainability in Computer-Aided Engineering Workshop |
| RMES | Rocky Mountain Entrepreneurial Summit |
| RMLC | Rocky Mountain Lacrosse Conference |
| RMPC | Rocky Mountain Philosophy Conference |
| RNDS | Raw and Natural Dog Summit |
| RNNC | Regional Neighborhood Network Conference |
| ROBOT | IEEE International Conference on ROBOTics and Automation |
| ROC | Revenue Optimization Conference |
| ROFLCon | Rolling On the Floor Laughing Conference |
| ROFLCon | Rolling On The Floor Laughing Convention |