Proceedings of the symposium held in Kansas City, Missouri, April 1991. The papers present state-of-the-art research results in database systems, computer networking and telecommunications, graph algorithms, data storage and management, AI and software engineering, computer education, database modeling, data and knowledge based systems, performance evaluation, database applications, distributed systems, database query processing, neural nets and expert systems, system performance, object-oriented systems, software systems and cryptography, and algorithm design. No index. Acidic paper. Annotation copyright Book News, Inc. Portland, Or.