| Media Ecology Association | Academic & Science |
| Means End Analysis | Academic & Science |
| Mathematics Education Association | Academic & Science |
| Measurement Engineering Australia | Academic & Science |
| Major Expense Authorization | Accounts and Finance |
| Macae | Airport Code |
| Mead Corporation | Business |
| Means Ends Analysis | Business |
| Mechanical Engineering Association | Business |
| Maryland Energy Administration | Business |
| Matanuska Electric Association | Business |
| MidAtlantic Employers' Association's | Business |
| Monoethanolamine | Chemistry |
| Music Educators Association | Community |
| Migrant Education Agency | Community |
| Minnesota Educators Association | Community |
| Michigan Education Association | Community |
| Missionary Education Assistance | Community |
| Maine Educational Assessment | Community |
| Marine Executive Association | Community |
| Midwest Economics Association | Community |
| Minnesota Educator Academy | Community |
| Maine Education Association | Community |
| Minnesota Economic Association | Community |
| Manatee Education Association | Community |
| Minnesota Education Association | Community |
| Mass Effect: Andromeda | Computing |
| Multiservice Enterprise Access | Computing |
| Mcafee Endpoint Assistant | Computing |
| Message Encryption Algorithm | Computing |
| Ministry of External Affairs | Country Specific |
| Middle East and Africa | Country Specific |
| Multi Electron Analysis | General |
| Multi Electrode Arrays | General |
| Merit Excellency Advocacy | General |
| Maximum Entropy Analytic | General |
| Maximum Entropy and Anlytic | General |
| Michelin Euro Assist | General |
| Modular Electric Architecture | General |
| Mercedes Electric Architecture | General |
| Mitsubishi Electric Automotive | General |
| Dodge Meadowbrook | General |
| Marklin Enthusiasts of America | General |
| Malt Extract Agar | General |
| Martin Ennals Award | General |
| Millennium Ecosystem Assessment | General |
| Model Envelope Action | General |
| Model Envelope and Action | General |
| Multi Electrode Array | General |
| MongoDB ExpressJS and AngularJS | General |
| Midwest Environmental Advocates | Governmental |
| Minimum En Route IFR Altitude | Governmental |
| Materials and Equipment Acceptance | Governmental |
| Minimum Enroute Altitude | Governmental |
| Multilateral Environmental Agreement | Governmental |
| Major Economic Area | Governmental |
| Maine Education Assessment | Governmental |
| Midwest ENERGY Association | Governmental |
| Municipal Employees Association | Governmental |
| Municipal Elections Act | Governmental |
| Energy Association | Governmental |
| Masyarakat Ekonomi ASEAN | International |
| Merchandising Execution Associate | Jobs |
| Medical Examiner of Arkansas | Jobs |
| Membrane Electrode Assembly | Medical |
| cysteamine (not an acronym) | Medical |
| Mean Electrical Axis | Medical |
| mercaptoethylamine | Medical |
| microelectrode array | Medical |
| Microwave Endometrial Ablation | Medical |
| Middle Ear Adenoma | Medical |
| Modern Equivalent Asset | Medical |
| Multiple Endocrine Adenomatosis | Medical |
| Medical Electronic Attachments | Medical |
| Munitions Effect Assessment | Military and Defence |
| Munitions Effectiveness Assessment | Military and Defence |
| Maintenance Entity Assembly | Military and Defence |
| Multi-element Antenna | Radio Science |
| Macae, Rio de Janeiro, Brazil | Regional |
| Multiple Engine Architecture | Softwares |
| Main Electronics Assembly | Space Science |
| Maintenance Engineering Analysis | Space Science |
| Materials Experiment Assembly | Space Science |
| Main Engine Assembly | Space Science |
