Stuart C. Shapiro is Professor of Computer Science and Engineering and Director of the Center for Cognitive Science at the University at Buffalo, The State University of New York. He received the S.B. in mathematics from MIT in 1966, and the M.S. and the Ph.D. in computer sciences from the University of Wisconsin - Madison in 1968 and 1971. Prof. Shapiro's research interests are in knowledge representation, reasoning, cognitive robotics, and natural language processing. He is editor-in-chief of The Encyclopedia of Artificial Intelligence (John Wiley & Sons, 1987, 1992), co-editor of Natural Language Processing and Knowledge Representation: Language for Knowledge and Knowledge for Language, (AAAI Press/The MIT Press, 2000), author of Common Lisp: An Interactive Approach (Computer Science Press, 1992), and author or coauthor of over 200 technical articles and reports. Prof. Shapiro is a member of the ACM, the ACL, the Cognitive Science Society, and Sigma Xi, a Senior Member of the IEEE, and a Fellow of AAAI. He has served as Chair of ACM/SIGART, and as President of Principles of Knowledge Representation and Reasoning, Inc.