- M
- M or MB
- M&A
- m-commerce
- M2M
- M2NY
- M4C
- M4M
- m4w
- M8 or M8s
- MA
- Mac
- machine learning
- machine translation
- Macintosh
- macrosite
- MacTCP
- MAE
- MAE-East
- MAE-West
- MAGA
- magic lantern
- magic smoke
- magnet employer
- magnetic
- mail bomb
- mail filter
- mailbot
- mailbox
- mailing list
- mainframe
- mainframe management
- mainsleaze
- Majordomo
- malvertiser
- malware
- MAMIL
- MAN
- management by spreadsheet
- mansplaining
- manthreading
- manual submission
- map
- Mapedit
- MAPI
- marching ants
- market share
- Market-Leninism
- martian packet
- mashup
- mashup ad
- massage the data
- matricized
- matrix
- MAYA
- MB
- MBF
- MBN
- MBONE
- Mbps
- MBRFN
- MC
- McAfees VirusScan
- MCI project
- McLuhanism
- MCM
- MCSE
- MD
- MD5 authentication
- MDMS
- MDR
- meatbot
- meatjail
- meatloaf
- meatspace
- mecca
- media contamination
- media fusion
- Media Lab
- meeting specialist
- mega menu
- mega-
- megabyte
- megahertz (MHz)
- MEGO
- meh
- MEJR
- melissa
- meltdown
- meme
- meme stock
- memorial state
- memory
- memory card
- mention
- menu
- menu bar
- merchant account
- merchant services
- merchantainment
- Merica
- MERP
- message board
- Met ED
- meta ignorance
- meta tag
- meta-
- metabrowser
- metacrawler
- metadata
- metajacking
- metamediary
- Metamediary CEO
- metaverse
- Metcalfe's Law
- metoobies
- Mezzanine financing
- MF
- MFBTY
- MFD
- MfG
- MFIC
- MFRC
- MFWIC
- MHBFY
- mhhm
- MHOTY
- MHYF
- MIA
- micro app
- micro moment
- micro payment
- micro-
- microblog
- microbrowser
- microchip graffiti
- microcontent
- microdisplay
- microinfluencer
- micromerch
- microphotonics
- micropost
- microprocessor
- microscopic art
- microserf
- microsite
- microsociety
- Microsoft's .NET
- mid-roll
- midair passenger exchange
- middle school dance
- middleware
- MIDI
- migrate
- MIH
- MIHAP
- MIL
- mil or .mil
- MILF
- milk
- milker
- millennials
- millingo
- MIME
- MIMO
- mind share
- mini-homepage
- minicomputer
- MINS
- mint
- MIP Mapping
- mips
- MIRL
- mirror
- MIS
- MISF
- misgender
- misinformation
- mission critical
- missionary selling
- MISTWEET
- MIT
- MITIN
- MIWI
- mixed reality
- mixed signal
- MKOP
- MLA
- MLAS
- mlm
- MLYLT
- MM
- MMDS
- MMHA2U
- mmk
- MML
- MMORPG
- MMS
- MMX
- MMYT
- MO
- mob
- mobile
- mobile app
- mobile card reader
- mobile device
- mobile moment
- mobile tagging
- mobile Web
- mobisode
- Moblin
- moblog
- modchip
- modem
- modemhead
- moderated mailing list
- moderated newsgroup
- moderator
- MOF
- MOFO
- mole
- mommy-save
- MOMPL
- monetizing eyeballs
- money
- monitor
- monitor pets
- monitoring service
- monitoring software
- moobs
- MOOC
- mood
- moonshine shop
- moonshot
- Moore's Law
- MOOS
- MOP
- mopper
- MorF
- morph or morphing
- MOS
- Mosaic
- MOSS
- most-favored nations
- MOT
- MOTAS
- MOTD
- mothballed
- motherboard
- MOTOS
- MOTSS
- mountain folk
- mouse
- mouse hand
- mouse pad
- mouse potato
- mousejacking
- mouselexia
- mousetrapping
- MOV
- MOV or .mov
- move fast and break things
- Mozilla
- MP3
- MP4
- MPEG
- MPFB
- MPM
- MR
- MRA
- MRM
- MROC
- MRPH
- MRT
- MS-DOS
- MSDSL
- MSG
- MSM
- MSMD
- MSNUW
- MSP
- MSTA
- MSTM
- MT
- MTBF
- MTF
- MTFBWY
- MTLA
- MTMMFBWY
- MTSBWY
- MTSITN
- MU
- MUAH or MWAH
- MUBAR
- muchomedia
- MUD
- MUD flaps
- mud shot
- muggle
- MULC
- multi-mediocrity
- multi-user
- multicast
- multilink
- multimedia
- multitasking
- multitiered application
- murk
- Murphy's laws on technology
- music-swapping
- MUSL
- MUSM
- MVA
- MVA no PI
- MVA w/PI
- MVO
- mvto
- MWBRL
- MWS
- MX record
- my
- my bad
- my heart
- MYL
- MYOB
- mystery house
- MYT
- MYWB
