| Abbreviation | Definition |
|---|---|
| MWA | Musicians With Attitude |
| MWB | Mike Watson Band |
| MWMF | Michigan Women's Music Festival |
| MWMF | Michigan Womyn's Music Festival |
| MWN | McVeigh Work Number |
| MWO | Michael Walters Orchestra |
| MWQA | Mid-West Quartet Association |
| MWR | Mad White Rappers |
| MWS | Metropolitan Wind Symphony |
| MYAMI | Miami Youth Action Music Initiative |
| MYCB | Middlesex Yeomanry (Duke of Cambridge's Own) Concert Band |
| MYCB | Middlesex Yeomanry Concert Band |
| MYD | Mourne Young Defenders |
| MYL | Music of Your Life |
| MYM | Melbourne Youth Music |
| MYMP | Make Your Momma Proud |
| MZC | Multi Zone Controller |
| N.I.L. | Nihilism Is Liberation |
| N.W.A. | Niggas Wit Attitudes |
| NAB | No Absorption Band |