| Meaning | Category |
| E Medsoft.Com | Business->AMEX Symbols |
| Macro Editor delete save (WordPerfect Library) | Computing->File Extensions |
| Madinah, Saudi Arabia | Regional->Airport Codes |
| Management Of External Data | Governmental->US Government |
| Manipulative Electronic Deception | Governmental->Military |
| Manual Entry Device | Governmental->NASA |
| Marine Emergency Duties | Miscellaneous->Unfiled |
| Marine Equipment Directive | Governmental->Transportation |
| Master of Education | Academic & Science->Academic Degrees |
| Maximum Effective Dose | Medical->Physiology |
| Mayan Epigraphic Database Project | Academic & Science->Architecture |
| Medial | Medical->Physiology |
| Medical | Governmental->Military Governmental->NASA |
| Medical Eligibility Determination | Governmental->Military |
| Medium | Governmental->Military Governmental->NASA |
| Meet Eat Dance | Miscellaneous->Unfiled |
| Member Enhancement Division | Miscellaneous->Unfiled |
| Message Element Dictionary | Governmental->Military |
| Minimal Erythemal Dose | Medical->Physiology |
| Minimum Effective Dose | Medical->Physiology |
| Minimum Erythemal Dose | Medical->Physiology |
| Mint Eye Disguise | Miscellaneous->Clothes |
| Modeling for Equipment Design | Academic & Science->Electronics |
| Music format (Amiga MED/OctaMED) | Computing->File Extensions |
| The Mediterranean Sea | Governmental->Military Governmental->US Government |
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