Hypertext is text which is not constrained to be linear. Hypertext is text which contains links to other texts. The term was coined by Ted Nelson around 1965. HyperMedia is a term used for hypertext which is not constrained to be text: it can include graphics, video and sound , for example. Apparently Ted Nelson was the first to use this term too.
http://www.w3.org/WhatIs.html
Ted Nelson's mother was an actress, and his father was a director. He went to Swarthmore College in the late 1950's, where he became a film maker. He then went to graduate school at the University of Chicago in 1959, followed by Harvard University in 1960, where he took a course in computer programming using an IBM 7090 computer and began to think about writing a document management system to index and organize his collection of notes.
As he considered the design of this system, Nelson applied his experience as a filmmaker with the conception of complex motion picture effects, moving from one shot to another, and conceived of the idea of hypertext. He became profoundly convinced of the enormous value of such a system, and has been thinking and talking about it ever since.
http://www.livinginternet.com/w/wi_nelson.htm
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