The foundation of the Internet. The part of the Internet for discussion groups. You use a newsreader to participate in newsgroups. The name of a particular user on a host or server. A small computer program that runs on your computer, usually causing damage.
Viruses can spread over networks.
Check all programs you download for viruses. The web is the graphical part of the Internet. A single document on the web displayed by your browser. The part of the Internet that allows you to browse through all kinds of text, graphics and multimedia with a web browser. Information on the web is formated into pages and sites.