- 1945: Vannevar Bush described Memex, a device that enabled hyperlinks on microfish.
- 1960s: Doug Engelbart prototyped the oNLine System (NLS). Hypertext browsing, editing, more. And mouse!
- 1960s: Ted Nelson coins the word "hypertext". (The XANADU model – deep hypertext.)
- 1991: Gopher (demo: direct | via proxy)