and specific types of data mining techniques that enable such systems. Also the chapter discusses the role of DM in customer relationship management. Three case studies that describe the implementation of knowledge dis- covery systems are presented, each based on different methodologies and intelligent technologies. The first system is based on the use of decision trees, or rule induction as a knowledge-modeling tool, and is described in the context of a real estate appraisal system. The second system is based on the use of Web-content mining to identify expertise in an expertise locator system. The third tool presents the use of an innova- tive tool used to improve the discovery of novel knowledge on the Web. Finally, the use of socialization in organizational settings is discussed as a mechanism to help discover new knowledge and catalyze innovation.