The Masterclass Knowledge Management (KM) is a set of six presentations describing and explaining KM via definitions, concepts, instruments and many practical examples, insights, stories and exercises as well as links and references. The material is the result of 25 years of research, consulting of challenging clients, discussions with appreciated peers and communities as well as ten years of lecturing on KM at various universities in Germany and Austria including discussions with many inspiring students. Contents: KM 1 – Knowledge and KM KM 2 – KM Processes 1 KM 3 – Soc.-t. KM Systems 1 / Processes 2 KM 4 – Socio-technical KM-Systems 2 KM 5 – Plan & Control Knowledge & KM KM 6 – KM and Idea / Innovation Mngt.