| Abbreviation | Definition |
|---|---|
| MABN | Mid Atlantic Brewing News |
| MAGS | Makes A Good Story |
| MAISA | Michigan Association of Intermediate School Administrators |
| MANA | Mail And News Agent |
| MANLAB | Manitoba Laboratory |
| MANSI | Mid Atlantic Newspaper Services Inc |
| MAOB | Mother Of All Bombs |
| MBCN | Midwest Biological Control News |
| MBN | Minority Business News |
| MBNG | Multi Bearer News Gathering |
| MBS | Mutual Broadcasting System |
| MBZ | Mandatory Broadcast Zone |
| MC | Mariah Carey |
| MCBI | Minnesota Christian Broadcasters, Incorporated |
| MCDM | Master of Communication in Digital Media |
| MCLC | Media Communications Learning Center |
| MCN | Motorcycle Consumer News |
| MCN | Movie City News |
| MCN | My Contractions News |
| MCO | Master Control Operator |