"The main idea of project Xanadu was a networked system that would store and index all of the world's literature and other forms of public and private information. One would access it through a system called hypertext - a "non-sequential" pattern of branches going in different directions, based on association.(Xanadu: Ted Nelson's Vision) Through this definition, Bush's influence on Nelson is evident. Nelson also included other visions within Xanadu: a system that would automatically bill a user for the delivery of copyrighted material, and thus reward the author; a historical record of each document, so a user could view changes made to it over time; a graphics console for the everyday user that included a keyboard and a pointing tool; and a unique way of linking documents, called a Parallel Textface.(Nyce & Kahn, 252)"
http://www-personal.umich.edu/~mattkaz/history/hypertext.html
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