A Network of Topical Links
Hypertext is the symbolic linking of additional information resources to some element of a document. This additional information could exist elsewhere in the same document, in a different document on the same server, or anywhere on the Internet. Often this additional information itself is linked to yet other information, creating a network of topically linked documents.
This topically linked network of ideas, which allows users to easily navigate from document to document, is the core concept behind the World Wide Web (WWW). Based on a client/server model, the WWW consists of a standardized set of protocols and procedures that enable client computers to communicate with server computers across the Internet and to request access to documents.
The capability to easily follow hypertext links from one document to another was a major paradigm shift in the early Internet. This was combined with the desire for a richer display of information than just plain text, while maintaining platform independence, to become the WWW that we know today.