CONTENTS: B.Z. Manaris, Natural Language Processing: A HumanComputer Interaction Perspective. E.J. Selker, Cognitive Adaptive Computer Help (COACH): A Case Study. J.A. Reggia, H.-H. Chou, and J.D. Lohn, Cellular Automata Models of Self-Replicating Systems. T.R. Nelson, Ultrasound Visualization. B. Goldfedder, Patterns and System Development. S. Paek and S.-F. Chang, High Performance Digital Video Servers: Storage and Retrieval of Compressed Scalable Video. P. Nelson, W. Richmond, and A. Seidman, Software Acquisition: The Custom/Package and Insource/Outsource Dimensions. Author Index. Subject Index.