Project Xanadu
The first hypertext project, started in 1960 by Ted Nelson. The most well-known fully fleshed-out conceptualization of hypertext and a competitor to the World Wide Web.
(en.wikipedia.org) Project Xanadu - Wikipedia website
ROAM_REFS: https://en.wikipedia.org/wiki/Project_Xanadu
Project Xanadu (ˈzænəduː ZAN-ə-doo) was the first hypertext project, founded in 1960 by Ted Nelson. Administrators of Project Xanadu have declared it superior to the World Wide Web, with the mission statement: "Today's popular software simulates paper. The World Wide Web (another imitation of paper) trivialises our original hypertext model with one-way ever-breaking links and no management of version or contents."
Wired magazine published an article entitled "The Curse of Xanadu", calling Project Xanadu "the longest-running vaporware story in the history of the computer industry". The first attempt at implementation began in 1960, but it was not until 1998 that an incomplete implementation was released. A version described as "a working deliverable", OpenXanadu, was made available in 2014.