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David Brown, author of "A Graduate-Level Expert Systems Course," is associate professor of computer science and coordinator of the AI Research Group at Worcester Polytechnic Institute, Worcester, Massachusetts 01609. His research is in the area of knowledge-based problem solving for design. Sandra Carberry, who wrote the report on the First International Workshop on User Modeling, is assistant professor of computer and information sciences and holds a joint appointment in the Department of Linguistics at the University of Delaware, Newark, Delaware 19716. David E. Heckerman, coauthor of "Thinking Bacltward for Knowledge Acquisition," is a Ph D. student in the Medical Information Sciences Program at Stanford University, Medical School Office Building, Room 215, Stanford Medical Center, Stanford, California 94305. His research interests include the representation and analysis of decision problems under uncertainty, particularly in medicine Robert F. Hink is president of Expert Systems ...