- mobility spectrometer
- mode conversion
- mode locking
- mode selector
- mode separation
- modem receiver
- modification program
- modified frequency
- modular circuit
- modular form
- modular spacing
- modular unit
- modulated beam
- modulated carrier
- modulated laser
- modulated oscillation
- modulated signal
- modulation amplifier
- modulation band
- modulation bandwidth
- modulation channel
- modulation compression
- modulation converter
- modulation depth
- modulation envelope
- modulation frequency
- modulation hardware
- modulation intelligence
- modulation level
- modulation rate
- modulation schedule
- modulation scheme
- modulation section
- modulation spectrum
- modulation technical
- modulator diode
- modulator driver
- module set
- modulo-2 sum
- moisture content
- molecular line
- molecule beam
- moment problem
- momentum balance
- momentum vector
- momentum wheel
- monitor code
- monitor equipment
- monitored frequency
- monitoring antenna
- monitoring feedback
- monitoring period
- monitoring station
- monoaccelerator CRT
- monochromatic beam
- monochrome display
- monochrome film
- monolithic amplifier
- monolithic array
- monophonic mode
- monophonic operation
- monophonic reception
- monophonic tape
- monopole antenna
- monotonic relationship
- molecular cloud
- molecular laser
- momentum transfer
- momentum unloading
- monetary transactions
- monitor
- monitoring duplication
- monitoring pilot
- monitoring platform
- monitoring receiver
- mono-fuel
- mono-pulse
- monochrome television
- monolithic storage
- monophonic programme
- monophonic service
- monophonic signal
- monophonic transmission
- monthly installments
- monthly median
- monthly probability
- moon landing
- motherboard
- mouse pad
- moving satellite
- multi-channel
- multi-domain
- morse
- MOS gate
- mosaic
- move block
- move mode
- movie film
- moving picture
- MUF factor