Penrose Tutorial and Guides, a HyperCard (hypertext) program designed to provide computer‐assisted reference service, was created by the author in the summer of 1989. Development in three months was possible only because material included in the program had been compiled over the previous three years and because the scripting and layout were based on a program developed by Apple Corporation. Scripting enhancements added by the author to the Apple program include hidden fields for collecting statistics, a conceptual map, a timed default to return the user to the opening card, and a suggestion box.
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