Explains a new way of handling information, on-line analytical processing (OLAP). Part I introduces OLAP systems, discussing rationale, problem solving, and OLAP relationship to prior systems. Part II details essential elements of OLAP, with chapters on data warehousing and data communications, OLAP software, and implementing a system. Part III describes typical applications of OLAP systems, looking at marketing, manufacturing, accounting, and human resources. For practitioners and academics in information systems, systems analysts and MIS managers, company managers, and end users of OLAP. Can also be used as an undergraduate or graduate text.