This book summarizes the state of knowledge management in a practice-oriented way. It is aimed at managers from small, medium, and large companies or non-profit organizations, as well as all other people involved in knowledge-oriented management, such as those from HR, R&D, IT, marketing, or administration and controlling. Compact articles, written from the perspective of companies, provide an overview of knowledge management, knowledge transfer, knowledge assurance, effective knowledge retrieval, and knowledge controlling/knowledge balance. An essential aspect is the presentation of cross-relationships to related management approaches such as quality, process and project management, social networks, innovation, and ethical management. Case studies illustrate how the outflow of knowledge through retirement or dismissal can be reduced.