| Mechanical Obstruction And Chemical Ablation | Academic & Science |
| More Opportunities for College Advancement | Academic & Science |
| Multimedia Over Co-ax Alliance | Business |
| Marin Organic Certified Agriculture | Business |
| Movement Opportunity and Community Awakening | Community |
| Men Of Christian Action | Community |
| Museum Of Computer Art | Community |
| Maine Old Cemetery Association | Community |
| Minnesota Ovarian Cancer Alliance | Community |
| Museum of Chinese in the Americas | Community |
| Museum of Chinese in America | Community |
| Museum of Contemporary | Community |
| Missouri Ozarks Community Action | Community |
| Metric Optimization for Computational Anatomy | Computing |
| Museum of Crypto Art | Cryptocurrency |
| Maintenance of Certification In Anesthesiology | Educational Degree |
| Museum Of Crappy Art | General |
| Matrix of Comparative Anthropogeny | General |
| MediaWiki Ontology Convergence Assistant | General |
| Measure Open Cut Anywhere | General |
| Mustang Owners Club Australia | General |
| Mustang Owners Club of Austin | General |
| Morgan Owners Club of Australia | General |
| Maserati Owners Club of Australia | General |
| Mazda Owners Club of America | General |
| Model Calibration | General |
| Mitsubishi Owners Club Azerbaijan | General |
| Minimum Obstruction Clearance Altitude | Governmental |
| Ministry of Civil Aviation | Governmental |
| Multimedia over Coaxial Alliance | Governmental |
| Media over Coax Alliance | Governmental |
| Mechanochemical Ablation | Medical |
| Montreal Cognitive Assessment | Medical |
| MN Ovarian Cancer Alliance | Medical |
| Mars Organic Carbon Analyzer | Space Science |
