| MMD | Microlithographic Mask Development program |
| MMDS | Multichannel Multipoint Distribution Service |
| MMIC | Monolithic microwave integrated circuit |
| MMM | Material movement management; Magnetism and Magnetic Materials |
| MMMC | Machine material movement component |
| MMMS | Material Movement Management Standard |
| MMO | Multimodel optimization |
| MMOS | Modified MOS |
| MMS | Windows Media Technology's transport protocol; Multimedia Messaging Service |
| MMST | Microelectronics Manufacturing Science and Technology |
| MMU | Memory Management Unit |
| mmwave | Millimeter Wave |
| Mn | Manganese |
| MNDO | Modified Neglect of Diatomic Overlap |
| MNOS | Metal-nitride-oxide semiconductor |
| MNS | Metal-nitride semiconductor |
| Mo | Molybdenum |
| MO | Metal-organic |
| MOCVD | MetalOrganic Chemical Vapor Deposition |
| MOD | Magneto Optical Disc |
| MODEM | MOdulator/DEModulator |
| MODFET | MOdulation Doped Field Effect Transistor |
| MOMBE | Metal-Organic Molecular Beam Epitaxy |
| MONET | Multi-wavelength Optical NETwork |
| MOP | Modify Operating Procedures |
| MORIE | MetalOrganic Reactive Ion Etching |
| MOS | Metal-Oxide Semiconductor |
| MOS-C | Metal Oxide Semiconductor Capacitor |
| MOSFET | Metal Oxide Semiconductor FET |
| MOT | Magneto Optical Trap |
| MOVPE | Metal-Organic Vapor-Phase Epitaxy |
| MP | Multi Phonon; Melting point; Massively parallel |
| MPA | Microwave Power Absorbtion |
| MPEG | Motion Picture Experts Group (aka MPG) |
| MPF | Mobile Payment Forum |
| MPL | Magneto Photo Luminescence; Multilevel pass transistor logic |
| MPLS | Multiprotocol Label Switching |
| MP-OES | Multi-point optical emission spectroscopy |
| MPP | Multiphase printing |
| MPRES | Modular plasma reactor simulator |
| MPSA | Mobile Payment Services Association |
| MPTS | Multi-Program Transport Stream |
| MPU | Microprocessor unit |
| MPW | Multi-Product Wafer |
| MPX | Multiplex |
| MQ-NMR | Multiple Quantum NMR |
| MQW | Multiple Quatum Well |
| MR | Magnetic resonance; Magneto resistive |
| MRI | Magnetic resonance imaginery |
| MRP | Materials requirements planning; Manufacturing resource planning |
| MRS | Materials Research Society |
| MS | Mass spectrometry; Mass spectrometer; Mass spectroscopy |
| MSA | Microscopy Society of America |
| MSB | Most significant bit |
| MSDC | Multistage Depressed Collector |
| MSDS | Material Safety Data Sheet |
| MSEM | Metrology Specific Equipment Model |
| MSG | Management Steering Group |
