- Mac / Macintosh
- Macro
- Macrolens
- Macrovision
- Magneetband
- mAH (MilliAmp-hours)
- MAHO (Mobile Assisted Hand-Over)
- Mail2SMS
- Mailinglijst
- Mailserver
- Mapi
- Masker
- Master DVD
- MBPS (Megabit Per Second)
- Mbps
- Media Center
- Meervoudig opstarten
- Megabyte / Mb
- Megahertz / Mhz
- Megapixel
- Memory Stick
- Mengpaneel
- Menubalk
- Merchant
- Message-ID
- META tag
- Microcel
- Microdrive
- Microdrive
- Microfonie
- Microfoon
- Middentonen
- MIDI
- Midi
- MIDI (Musical Instrument Digital Interface)
- Miniatuurafbeelding
- Mirror
- Miscast
- MLP (Meridian Lossless Packing)
- MLP (Meridian Lossless Packing)
- MMO RPG
- MMS (Multimedia Messaging Service)
- MMS
- MMX
- MO (Mobile Originated)
- Mobiele data
- Modem
- Moderator
- Moederbord
- Moederbord
- Moiré
- Moirê
- Monitor
- Mono
- Morfen
- Mounten
- MOUS
- Mozilla
- MP3 (MPEG-1 Layer 3)
- MP3
- MP3-speler
- MPEG (Moving Picture Experts Group)
- MPEG
- MPEG Movie-HQX
- MPEG-2 MultiChannel Surround
- MPS
- MT (Mobile Terminated)
- MTBF
- MTR (Mobile Terminated - Reversed billing)
- Muis
- Multi AF
- Multimedia
- Multimediacard (MMC)
- Multiplexing
- Multiposten
- MUSE / Hi-Vision (MUltiple sub-nyquist Sampling Encoding)
- MySQL
