| Abbreviation | Definition |
|---|---|
| RMCM | Richy Mitch And The Coal Miners |
| RMCM | Royal Manchester College of Music |
| RMES | Ridgecrest Musical Enrichment Society |
| RMG | Reflection Music Group |
| RMH | Rocky Mountain High |
| RMLC | Radio Music License Committee |
| RMMG | Rec Music Makers Guitar |
| RMMO | Rocco Mani Mood Orchestra |
| RMO | Rude Mechanical Orchestra |
| RMPB | Rocky Mountain Pipe Band |
| RMPO | Royal Melbourne Philharmonic Orchestra |
| RMRM | Rocky Mountain Rebel Music |
| RMRS | Rivington Music Rehearsal Studios |
| RMS | Realtime Music Solutions |
| RMT | Registered Music Teacher/Canada |
| RMT | Rockville Musical Theatre |
| RMTB | Room Music Tit Bits |
| RMV | Roblox music video |
| RNB | Red Neck Blues |
| RNB | Rhythm and Blues |