| Abbreviation | Definition |
|---|---|
| METS | Materials and Equipment Trading Service |
| MEV | Mega-ElectronVolt |
| MEW | Matsushita Electric Works |
| MEWI | Midget Electronic Weight Indicator |
| MF | Magnetic Field |
| MF | Multi-Frequency |
| MFA | Multi-Fiber Arrangement |
| MFC | Mass Flow Controller |
| MFCC | Maximum Free Carrier Concentration |
| MFCI | Mean Field Configuration Interaction |
| MFD | Multi-Function Device |
| MFI | MalFunctional Item |
| MFKP | Multi-Frequency Key Pulsing |
| MFL | Mechanical Feedback Loop |
| MFL | Micro-Fabrication Laboratory |
| MFLD | Multifunctional Logic Devices |
| MFLOPS | Million Floating-Point Operations Per Second |
| MFM | Magnetic Force Microscopy |
| MFM | Mass Flow Meter |
| MFMIS | Metal Ferroelectric Metal Insulator Semiconductor |