| Acronym | Definition |
|---|
| RMMS➣Rocky Mountain Mystery School (Tokyo, Japan) |
| RMMS➣Rocky Mountain Map Society (est. 1991; Denver, CO) |
| RMMS➣Royal Mail Motor Ship (UK) |
| RMMS➣Routine Maintenance Management System |
| RMMS➣Rocky Mountain Middle School (various locations) |
| RMMS➣Remote Maintenance Monitoring System |
| RMMS➣Rural/Metro Medical Services |
| RMMS➣Randy Macho Man Savage (pro wrestler) |