14, 1999International Business Machines CorporationAutomatic subspace clustering of high dimensional data for data mining applicationsUS6078955 *Aug 27, 1997Jun 20, 2000Hitachi, Ltd.Method for controlling a computer system including a plurality of computers and a network processed as a user resourceUS6094645 *Nov 21, 1997Jul 25, 2000International Business Machines CorporationFinding collective bas