Identifies five design requirements for electronic encyclopedias, based on the content and structure of printed encyclopedias and the uses that people make of them. Three existing hypertext programs (Owl International's Guide, HyperCard, and HyperTIES) are compared in terms of their ability to satisfy these design requirements. (CLB)

This special feature focuses on recent developments in optical disk technology. Nine articles discuss current trends, large scale image processing, data structures for optical disks, the use of computer simulators to create optical disks, videodisk use in training, interactive audio video systems, impacts on federal information policy, and…