Internet Relay Chat. A sort of real-time conference.

Integrated Services Digital Network. The high-powered 'telephone' line used to connect servers to the Internet.

Internet Service Provider. A commercial company which allows you to access the Internet.

Part of a mail packet that shows the source, destination and route. The 'envelope' of your message.

HyperText Mark-up Language. The set of controls that produce smart WWW documents.

Hypertext Transfer Protocol. The method that the WWW uses to transfer those smart WWW documents.

Someone who enjoys exploring computer systems. It doesn't always mean an illegal hacker, as the Press seem to think.

A modem manufacturer whose commands have become the standard.

A program that displays information on users and other things on a remote system.

An abusive or personal attack on another user.