Discusses methods for the retrieval of help knowledge items using graphical tree structures that conform to the hierarchical nature of the tutorial information being referenced. The implementation of "Study Tree Presenter," a special purpose "hypertext shell" that provides such access is described and several samples of screen…

Describes the development of the Course Advising Tool (CAT), a microcomputer-based information retrieval program that uses hypermedia and visual programing tools to help students develop their course schedules. The use of graphical cues and nonsequential navigation is discussed, and possible extensions to the system are described. (19 references)…