Hard disk - The main disk inside a computer used for storing programs and information. It is hard because it is metal.

Icon - A small image or picture on a computer screen that is a symbol for folders, disks, peripherals, programs etc.

Kb, Mb, Gb - Kilobytes, megabytes, gigabytes. Used to measure computer memory and storage.

Memory - Memory is for the temporary storing of information while a computer is being used. See RAM, ROM and Cache.

MHz - Megahertz. This describes the speed of computer equipment. The higher the MHz the better the performance.

Modem - Equipment connected to a computer for sending/receiving digital information by telephone line. You need a modem to connect to the Internet, to send electronic mail and to fax..