This project will design and evaluate software prototypes to examine three issues in hypermedia design. 1. What is the proper balance between user and system control? 2. What strategic knowledge is needed to take advantage of the new dimensions of information available and how can the system's design aid in the acquisition of the knowledge? 3. What is the most effective way to integrate information from different presentation modalities? Specifically, how can we take advantage of the complementary information characteristics of text, sound, and video when presented in an interactive format?