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- Hacker
- Halbbyte
- Halbduplex
- Handheld-PC
- Handheld PC 2000
- Handscanner
- Handshake
- Handy
- hängernder Einzug
- Hardcopy
- Harddisk
- Harddisk-Recording
- Hardware
- Hardwareschutz
- harte Bedachung
- Hashing
- Hauptspeicher
- Haupttragwerk
- Hauptverzeichnis
- Hayes
- Hayes Befehlssatz
- Hayes-kompatibel
- HBCI
- HDLC
- HDSL
- HDTV
- Headcrash
- Header
- Headline
- Heap
- Heidi
- Heimcomputer
- Helvetia
- Hercules-Grafikkarte
- Hertz
- hetorogene Netze
- Hewlett-Packard
(HP)
- Hewlett Packard Graphics Language (HPGL)
- Hexadezimal
- HFC
- HGC
- Hi 8
- Hidden
- Hidden-Line
- HiFD
- High Capacity
- High Color / HiColor
- High Density
- High DOS Memory
- High Memory
- High Performance
- High Resolution
- Hintergrundprogramm
- Hintergrundverarbeitung
- Hit
- Histogramm
- HKS
- HLS-Farbsystem
- HMA
- HMD
- Hoax
- Hochhaus
- höhere Programmiersprachen
- Hologramm
- Homebanking
- Homecomputer
- Homedeck
- Homepage
- Hop (Sprung)
- HOP (HomeCast Open Protocol)
- Horizont
- Horizontalfrequenz
- Hosiden (Mini-DIN)
- Host
- Hoster
- HOSTS
- Hot-Key
- Hotline
- Hotlist
- HP
- HPA
- HPFS
- HPGL
- HPN
- HPPCL
- HPTC
- hqx
- HSB-Modell
- HSCSD
- HTML
- HTML-Author
- HTML-Dokument
- HTML-Editor
- HTML-E-Mail
- HTTP
- HTTP-NG
- HTTP-Server
- Hub
- Hue
- Hurenkind
- Hybrid
- Hyperlink / Hypertext-Links
- Hypermedia
- Hyper Talk
- Hypertext
- Hyperspace
- Hz

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