| Abbreviation | Definition |
|---|---|
| MADS | Mid Atlantic Drivers School |
| MAEI | Morningstar Air Express Inc |
| MAEP | Morgantown Area Economic Partnership |
| MAFSS | Maryland Automated Firearm Services System |
| MAG | Manga Anime and Gaming |
| MAGIC | MidAmerica GIS Consortium, Ltd. |
| MAHT | Mackenzie Alpine Horse Trekking (New Zealand) |
| MAI | Medical Action Industries |
| MAI | Military Action Incorporated |
| MAIA | Malagasy Artificial Intelligence Art |
| MAIC | Mid-Atlantic Internet Cooperative |
| MAIT | Manufactures Association of Information Technology |
| MAL | Management Alternatives, LTD. |
| MAL | Model Aircraft Laboratories |
| MAMAA | Meta, Apple, Microsoft, Amazon, Alphabet |
| MAMS | Mobile Air Movement Service |
| MANAA | Meta, Apple, Netflix, Amazon, Alphabet |
| MANSI | Mid Atlantic Newspaper Services Inc |
| MANY | MEDICAL ANALYTICS INC. |
| MAOCI | Model A Owners of Canada Inc |