hypertext Hypertext http://en.wikipedia.org/wiki/History_of_hypertext http://en.wikipedia.org/wiki/History_of_hypertext historical illustrations historical illustrations Wikipedia figures older examples invented decades earlier historical illustrations History of hypertext historical illustrations http://en.wikipedia.org/wiki/History_of_hypertext early hypertext systems https://en.wikipedia.org/wiki/History_of_hypertext History of hypertext historical illustrations Wikipedia figures early hypertext systems was explicitly conceived https://en.wikipedia.org/wiki/History_of_hypertext