Implementations
Besides the already mentioned Project Xanadu, Hypertext Editing System, NLS, HyperCard, and World Wide Web, there are other noteworthy early implementations of hypertext, with different feature sets:
- FRESS – A 1970s multi-user successor to the Hypertext Editing System.
- ZOG - A 1970s hypertext system developed at Carnegie Mellon University.
- Electronic Document System – An early 1980s text and graphic editor for interactive hypertexts such as equipment repair manuals and computer-aided instruction.
- Information Presentation Facility – Used to display online help in IBM operating systems.
- Intermedia – A mid-1980s program for group web-authoring and information sharing.
- KMS - a 1980s successor to ZOG developed as a commercial product.
- Storyspace – A mid-1980s program for hypertext narrative.
- Texinfo – The GNU help system.
- XML with the XLink extension – A newer hypertext markup language that extends and expands capabilities introduced by HTML.
- Wikis – aim to compensate for the lack of integrated editors in most Web browsers. Various wiki software have slightly different conventions for formatting, usually simpler than HTML.
- Adobe's Portable Document Format – A widely used publication format for electronic documents including links.
- Windows Help
- PaperKiller - A document editor specifically designed for hypertext. Started in 1996 as IPer (educational project for ED-Media 1997).
- Amigaguide - released on Amiga Workbench 1990.
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