- monolithic integrated circuit
- monolithic microwave intergrated amplifier
- monolithic ceramic capacitor
- monomode fiber
- monophone
- monopole
- monopulse radar
- monostable trigger-action circuit
- monostatic radar
- MOS memory
- MOS process technology
- moth bite test
- mould test
- mounting technology
- moving coil microphone
- moving target indication radar, MTI radar
- MQW semiconductor laser
- multi-beam antenna
- multi-burst signal
- multi-port network
- multi-step avalanche chamber
- multi-terminal network
- multi-tone command
- multialkali photocathode
- multicavity magnetron
- multichannel analyser
- multichannel communication
- multichannel telemetry
- multichip circuit
- multichrome penetration screen
- multiformator
- multiframe
- multigraph
- multijunction solar cell
- multilayer dielectric passivation
- multilayer printed board
- multilayer wiring
- multilevel metallization
- multilevel resist
- multimeter
- multimode fiber
- multipath effect
- multipersistence penetration screen
- multiple access
- multiple access channel
- multiple ribbon growth
- multiple sampling
- multiple-beam radar
- multiplexer
- multiplexing