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H

HDMI (high-definition multimedia interface)

Required for connecting devices to show high-definition video.

HDTV

High-definition TV.

Hacker

Someone who gains unauthorised access to a computer in order to obtain data stored on it.

Hardware

The physical parts of a computer system, e.g. the CPU and the devices connected to it.

High definition (HD)

The picture on a TV screen is made of lines of pixels. In a conventional TV there are 625 lines, which are refreshed 25 times per second. HD has either 720 or 1080 lines, so it produces a clearer sharper picture.

Home page

This is the first screen of an interactive digital product. It usually has some sort of introduction to the product and a table of contents.

Hot desking

Sharing desks or workstations between workers, as a way of saving space and resources.

Hotspot

A venue that offers a WiFi Internet connection. Many are located in hotels and restaurants and lots of them are free.