| Abbreviation | Definition |
|---|---|
| MSBD | Middle School Band Day |
| MSBD | Middle School Band Director |
| MSCB | Middle Spunk Creek Boys bluegrass band |
| MSCN | Music for Screen Collaboration Network |
| MSCO | Musica Sacra Chamber Orchestra |
| MSF | Music Special Forces |
| MSFTS | Musicians Scoring Famous Talks and Speeches |
| MSJ | Music Studio and Jazz |
| MSMA | Music Study Mobility and Accountability |
| MSML | Music Saved My Life |
| MSO | Madison Symphony Orchestra |
| MSO | Maryland Symphony Orchestra |
| MSO | Memphis Symphony Orchestra |
| MSO | Milwaukee Symphony Orchestra |
| MSO | Mississippi Symphony Orchestra |
| MSO | Montreal Symphony Orchestra |
| MSOC | Manchester Symphony Orchestra and Chorale |
| MSOL | Madison Symphony Orchestra League |
| MSOM | Muhammad School Of Music |
| MSP | Music Service Provider |