| Abbreviation | Definition |
|---|---|
| RSM | Resource Standard Metrics |
| RSM | Ride Some More |
| RSM | Ridiculously Sad Masturbators |
| RSM | Robert S McNamara |
| RSM | Ruger Safari Magnum |
| RSMA | Red Stripe Music Award |
| RSMA | Remote System Monitoring Application |
| RSMA | Road Safety Manufacturers Association |
| RSMA | Road Safety Markings Association |
| RSMA | Royal School of Mines Association |
| RSMA | Royal Society of Marine Artists |
| RSMB | Reel Smart Motion Blur |
| RSMB | ReelSmart Motion Blur |
| RSMB | Repetitive Sensory and Motor Behaviors |
| RSMC | Rural and Suburban Mail Carrier |
| RSME | Rand Society of Model Engineers |
| RSME | Rating Scale Mental Effort |
| RSME | Reading Society of Model Engineers |
| RSME | Real Sociedad Matemática Española |
| RSME | root square mean error |