Information technology

Global Positioning System (GPS)	Global System for Mobile Communications (GSM)	Group Therapy	Hacker	Hard Disk
Hardware	Helmet	Hyperlink, hypertext	Hypertext	HyperText Markup Language (HTML)
HyperText Transfer [Transport] Protocol (HTTP)	ID (identifier)	IDE	Identification	Identifier
Increment	Index	Informatics	Information and Communications Technology, ICT	Information Retrieval (IR)
Information System	Information Technology	Informational communication	Informational Model	Informatization
Infrastructure	Infrastructure as a Service (IaaS)	Inheritance	Initialization	Input Device
Installation	Instruction	Integration	Intellectual Information Technologies	Interface
Intermediate Language	Interpolation	Intranet	IP Address	ISO
IT Security	Iteration	Keyword, Reserved Word	Knowledge Base Management System	Knowledge Database
Knowledge Management	Language Implementtation	Learning Management System (LMS)	Lexeme	Lexical Analysis