Focuses on the user and human-computer interaction aspects of the research based on the Okapi text retrieval system. Three experiments implementing different approaches to query expansion are described, including the use of graphical user interfaces with different windowing techniques. (Author/LRW)

Describes the nature of electronic books that are published primarily on CD-ROM. Discusses common delivery platforms; human-computer interface issues; and authoring. Outlines pedagogical benefits and potential, including their interactivity, portability, connectivity, and dynamic behavior that make them beneficial for both individual and…