magnetic tape reader
magnetic tape unit
magnetic-ink character recognition
magneto-optic disk
mail filter
mailbox
mailing list
main
main body
main dictionary
main document
main function
main instruction buffer
main memory
main memory unit
main menu
main path
main program
main screen
main segment
main storage
maintain
maintenace contract
maintenance
maintenance routine
major cycle
major geographic domain
major key
majority function
male connector
male jack
male plug
malfunction
MAN
management
manager
Manchester coding
manipulation
manipulation button
man-machine communication
manual
manual control
manual feed
manual input
manual operation
manuscript
mark
Markov chain
mask register
mask word
masking
mass storage
master file
master key
master program file
master record
master routine
master synchronizer
match
matching
math
math coprocessor
math processor
mathematical characters
mathematical expression