This chapter discusses how knowledge management systems (KMS) support knowledge management through various technologies. It describes how KMS enable knowledge capture and exchange, as well as the acquisition, documentation, transfer, creation and application of knowledge. The chapter then explains the key components of a KMS, including business process management, content management, web content management, and knowledge applications management. It emphasizes that a KMS is made up of interconnected subsystems that can operate independently but also contribute to the larger, more comprehensive system. The chapter concludes by noting that KMS development requires justification of need, identification of requirements, selection of options, implementation, and evaluation of adoption and acceptance.