Explores the variety and richness of support systems — the wide range of users, problems, and technologies employed and illustrates how the concepts and principles have been applied in specific systems. Designed to be a primary text for understanding this continually developing field — to help students and practitioners understand the principles and concepts that guide the development and use of these systems. The authors include the full range of systems and users, but with some extra emphasis on managers and their use of systems such as EIS, rather than an emphasis on management analysts who develop expert systems.