| Abbreviation | Definition |
|---|---|
| MBSI | Music Box Society International |
| MBTM | Must Be The Music |
| MBW | Music Business Worldwide |
| MBWT | M Band Wavelet Transform |
| MC | Mad Catz |
| MC | Music Coordinator |
| MC | My Computer |
| MCA | Music Company Ascap |
| MCA | Musicians Cemetery Of America |
| MCAA | Music City Auto Auction |
| MCAW | Music Council of the Arab World |
| MCB | Madison Community Band |
| MCB | Maidenhead Citadel Band |
| MCCM | Master of Contemporary Chamber Music |
| MCDC | Music Choice Dance Channel |
| MCDC | Music City Distance Carnival |
| MCDC | Music City Drum Corps |
| MCE | Miss Cat Ears, singer |
| MCGA | Music City Golf Association |
| MCGC | Morehouse College Glee Club |