Hacker: Currently, a person who gains access to computer Systems illegally, usually from a personal computer.
Handheld scanner: A small scanner that can be passed over a sheet of paper, thus using optical recognition to convert text or drawings into form.
Hard copy: Printed paper output.
Hard disk: A magnetic disk
Hybird Computer: Any mixed computer system in which analog and digital computing devices are combined.
Hz: Abbreviation of Hertz
Hexadecimal: Regarding number system, the hexadecimal number system uses exactly 16 symbols, the digits 0 through 9 and the letters A through F.
High-Level language: An English-like programming language that is easier to use than an older symbolic language.
Home page: The first page of a web site.
Hyper Text Markup Language (HTML): A programming language used to write pages for the Web.