M
- M
- M$
- macdink
- machoflops
- Macintoy
- Macintrash
- macro
- macro-
- macrology
- maggotbox
- magic
- magic cookie
- magic number
- magic smoke
- mail storm
- mailbomb
- mailing list
- main loop
- mainframe
- mainsleaze
- malware
- man page
- management
- mandelbug
- manged
- mangle
- mangled name
- mangler
- manularity
- marching ants
- marbles
- marginal
- marginally
- marketroid
- Mars
- martian
- massage
- math-out
- Matrix
- mav
- maximum Maytag mode
- McQuary limit
- meatspace
- meatware
- meeces
- meg
- mega-
- megapenny
- MEGO
- meltdown, network
- meme
- meme plague
- memetics
- memory farts
- memory leak
- memory smash
- menuitis
- mess-dos
- meta
- meta bit
- metasyntactic variable
- MFTL
- mickey
- mickey mouse program
- micro-
- MicroDroid
- microfortnight
- microLenat
- microReid
- microserf
- Microsloth Windows
- Microsoft
- micros~1
- middle-endian
- middle-out implementation
- milliLampson
- minor detail
- MIPS
- misbug
- misfeature
- missile address
- MiSTing
- miswart
- MMF
- mobo
- moby
- mockingbird
- mod
- mode
- mode bit
- modulo
- mojibake
- molly-guard
- Mongolian Hordes technique
- monkey up
- monkey, scratch
- monstrosity
- monty
- Moof
- Moore's Law
- moria
- MOTAS
- MOTOS
- MOTSS
- mouse ahead
- mouse belt
- mouse droppings
- mouse elbow
- mouse pusher
- mouso
- MS-DOS
- mu
- MUD
- muddie
- mudhead
- muggle
- Multics
- multitask
- mumblage
- mumble
- munch
- munching
- munching squares
- munchkin
- mundane
- mung
- munge
- Murphy's Law
- music
- mutter