| Abbreviation | Definition |
|---|---|
| MDQW | Modulation-Doped Quantum Well |
| MDRAM | Multibank Dynamic Random Access Memory |
| MDS | Modify Device Status |
| MDU | Modular Dispensing Unit |
| MEAA | Mitsubishi Electric Automotive America |
| MEAF | Mitsubishi Electric America |
| MEAN | Midi Electronics Audio Noise |
| MEBS | Medium Energy Backscattering Spectrometry |
| MEC | Mechanical Electronics and Computing |
| MEC | Mecklenburg Electric Cooperative |
| MEC | Medical Electronic Construction |
| MEC | Mississippi Electronic Courts |
| MECA | Massachusetts Electrical Contractors Association |
| MECA | Mechanical Electrical Civil and Architectural |
| MECA | Mechanical Electrical Civil and Architecture |
| MECA | Mechanical Electrical Civil Architectural |
| MECA | Michigan Electric Cooperative Association |
| MECA | Mobile Electronics Competition Association |
| MECI | Machine Electrical Consultants Inc |
| MECP | Mobile Electronic Certified Professional |