The unique name that identifies a computer on a network. On the Internet, the host name is in the form "comp.xyz.net"; if there is only one Internet site the host name is the same as the domain name. One computer can have more than one host name if it hosts more than one Internet site, however (for example, "home.xyz.net" and "comp.xyz.net"); in that case "comp" and "home" are host names and "xyz.net" is the domain name.

A hypertext document is one that includes links (connections) to other documents. In concept this is similar to including footnotes in a printed document. However, in a hypertext document you can switch to the connected item by clicking on a hot spot, usually indicated by a different color from the surrounding text. In the World Wide Web links can lead to other documents on the same data server, or might take you to other servers.