| Mars Atmospheric Acquisition and Compression | Academic & Science |
| Mid Atlantic Archaeology Conference | Academic & Science |
| Middle Atlantic Archaeological Conference | Academic & Science |
| Maya Academy For Advanced Cinematics | Academic & Science |
| Metropolitan Area Advisory Committee | Business |
| Multimodal Accessibility Advisory Committee | Business |
| Master in Accounting And Controlling | Business |
| Members and Associates Advisory Council | Business |
| Montrose Athletic Advisory Council | Business |
| Muni Accessibility Advisory Committee | Business |
| Miles Across America Club | Community |
| Modesto Area Aquatic Club | Community |
| Model Aeronautics Association Of Canada | Community |
| Michiana Annual Art Competition | Community |
| Midwest Antique Airplane Club | Community |
| Marine Affairs Alumni Club | Community |
| Movimiento Aut?tico Aut?omo Coste? | General |
| Manhattan Art and Antiques Center | General |
| Mid Atlantic Affiliate Challenge | General |
| Movimiento Auténtico Autónomo Costeño | General |
| Multi Age Alternative Classroom | General |
| Mid America Assistance Coalitions | General |
| Mid-Atlantic Aviation Coalition | General |
| Manga Anime and American Comics | General |
| Manitoba Association of Auto Clubs | General |
| Massachusetts Association of Automobile Clubs | General |
| Mopar Alley Automobile Club | General |
| Midwest Antique Auto Club | General |
| Multi Agency Alliance For Children | Governmental |
| Mid Atlantic Area Councils | Governmental |
| Mid Atlantic Area Council | Governmental |
| Medical Assistance Advisory Council | Governmental |
| Medical Assistance Advisory Committee | Medical |
| Magical African American Character | Regional |
| Metro Atlantic Athletic Conference | Sports |
| McPherson Academic and Athletic Center | Sports |
| McPherson Academic and Athletic Complex | Sports |
