| Medical Education Development Center | Academic & Science |
| Med-Design Company | Business |
| Manchester Engineering Design Consultancy | Business |
| Maharashtra Economic Development Council | Business |
| Mid East Development Corporation | Business |
| Manchester Engineers Design Consortium | Business |
| Marlborough Economic Development Corporation | Business |
| Montgomery Economic Development Corporation | Business |
| McAllen Economic Development Corporation | Business |
| Monadnock Economic Development Corporation | Business |
| McKinney Economic Development Corporation | Business |
| McCook Economic Development Corporation | Business |
| MI Econ Dev Corp | Business |
| Mobile and Embedded Developers Conference | Community |
| Massachusetts Economic Development Council | Community |
| More Environmental Development Consideration | Community |
| Montrose Economic Development Council | Community |
| Manchester Economic Development Consortium | Community |
| Mississippi Economic Development Council | Community |
| Monticello Economic Development Commission | Community |
| Maryland Economic Development Commission | Community |
| Manvel Economic Development Corporation | Community |
| Mansfield Economic Development Corporation | Community |
| Municipal Economic Development Commission | Community |
| Management and Executive Development Centre | Community |
| Middle Eastern Dance Club | Community |
| Mendon Economic Development Committee | Community |
| Mobile Embedded Developers Conference | Computing |
| Mobile and Embedded Devcon | Computing |
| Main Engine Data Concentrator | General |
| More economically developed countries | General |
| Morley Extended Day Care | General |
| Make Every Day Count | General |
| More Economical Developed Country | General |
| Mediocre Economically Developed Country | General |
| More Economically Developed Country | Governmental |
| Milwaukee Economic Development Corporation | Governmental |
| Missouri Economic Development Council | Governmental |
| Middletown Economic Development Corporation | Governmental |
| Michigan Economic Development Corporation | Governmental |
| Menos Esquerra Democrática de Catalunya | International |
| My Easy Definition Category | Internet |
