The multi-volume Encyclopedia of Database Systems provides easy access to relevant information on all aspects of very large databases, data management, and database systems. More than 1,300 illustrated essays and definitional entries, organized alphabetically, present basic terminology, concepts, methods and data processing algorithms, key results to date, references to the literature, and cross-references to other entries and journal articles. Topics including areas of current interest as well as research results of historical significance were selected by a distinguished international advisory board and written by world-class experts in the field.