H.261
H.262
H.323
H.324
Habillage
Hachage
Hacker
Hacking
HAL
Half duplex
Halftone
Hamming code
Hamming distance
Handle
Handshaking
Hard reset
Hardcopy
Harddisk
Hardware
Hardware handshake
Harmony
Hartley
Hash
Hash total
Hashcoding
Hatching
Haut débit
Hayes
HCD
HCI
HCL
HD
HDBMS
HDI-30
HDLC
HDML
HDSL
HDTP
HDTV
Head
Header
Hébergement
Hébergement dédié
Hébergement virtuel dédié
HEC
Help Desk
Helsinki University
Helvetica

HEPNet
Héritage
Héritage multiple
Hermann HOLLERITH
Hertz
Heuristique
HEX
Hexachrome
Hexadécimal
Hexet
HF
HFC
HFS
HGC
Hgopher
HI-8
Hibernation
Hiérarchie
HiFD
High Color
High Memory
Himem.sys
HIPPI
Hiragana
HIT
HKEY
HKSAR
HLP
HLS
HMA
HMI
HMMP
HMMS
HMON
HNDTL
hoax
HOL
Hologramme
Holy War
Homedir
Homedrive
Homepage
Homepath
Homeplug 1.01
Homeshare
Hook
Hop
Horloge Interne

Host
Hostname
HotBot
Hôte
Hoteling
HotJava
Hotline
Hotlist
Hotmail
Hotplug
Hotspot
howto
HP-UX
HPC
HPFS
HPGL
HPPI
HRMS
HSB
HSCSD
HSR
HSSI
HST
HSTR
htaccess
HTML
htpasswd
HTTP
HTTPD
HTTPS
Hub
Huffman
Hybrid Hub
Hyper-threading
Hypercard
Hyperlien
Hypermédia
Hypertexte
HyperZ
Hypothesis
Hysteresis
Hytelnet
Hz