| Acronym | Definition |
|---|
| RMSS | Risk Management Software Solutions (Australia) |
| RMSS | Rocky Mountain Star Stare (Colorado) |
| RMSS | Roland Michener Secondary School (Ontario, Canada) |
| RMSS | Resilient Mass Storage Server |
| RMSS | Reduced Memory System Simulator |
| RMSS | Rocky Mountain Stamp Show (Denver, Colorado) |
| RMSS | Remote Manipulator System Simulator |
| RMSS | Risk Management and Safety Systems |
| RMSS | Reliability, Maintainability, Supportability and Safety |
| RMSS | Regimental Medical Supply Section |
| RMSS | Risk Management Strategic Services, LLC |
| RMSS | Root-Mean-Square in Seconds (US Geological Survey; used to calculate accuracy of quake power models) |
| RMSS | Resources Management Support Strategy |
| RMSS | Rocky Mountain Stick Shifters (drag racing forum) |