| Abbreviation | Definition |
|---|---|
| M | Multimedia |
| MA | Media Access |
| MA | Miss America |
| MAA | Modifier, Attributive, Adverb |
| MAB | Multimedia Advertising and Broadcasting |
| MAC | Media Action Committee |
| MAC | Multiplexed Analog Components |
| MACM | Michigan Association of Court Mediators |
| MAD | Midi And Digital |
| MAD | Music, Art, and Drama |
| MAFF | Multiple-Authored Fan Fiction |
| MAFIA | Management Assisted Films In Action |
| MAIB | Messing About In Boats Magazine |
| MAIS | Mountain Area Information Network |
| MAMS | Master Agency Media Services |
| MAOC | Media Alliance of Orange County |
| MAP | Media Awareness Project |
| MAPS | Modern American Poetry Site |
| MAR | Marchen Awaken Romance |
| MARS | Mobile Audience Response Systems |