hypertext

A text that contains links to other documents. In a hypertext, words or phrases in the document can be chosen by a reader which cause another document to be retrieved and displayed. [google.com]

Conceptually, hypertext conceives information as nodes and link networks forming navigable path that can be toured, returned to and referenced in non-linear or multi-linear fashion. [cyberartsweb.org]

This site uses "computer hypertext" in it's broadest sense as text composed of blocks of words (or images) linked electronically by multiple paths, chains, or trails in an open-ended, perpetually unfinished textuality described by the terms link, node, network,web, and path. [George P. Landow in Hypertext 2.0]

Ted Nelson is given general credit for coining the term.