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Users of hypertext systems often find themselves eagerly following hypertext links deeper and deeper into a hypertext web, only to find themselves "lost" and unable find their way back to previously visited pages. As navigation aids to help users orient themselves in the Web, browsers often provide a list of the documents a user has visited, a way to move forward and backward along previously traversed links, and a quick way to return to a home document. Still, users often have trouble revisiting a page that was previously viewed in a session, especially after many invocations of the backtracking shortcuts.
Ayers et al. (Mon,) studied this question.