This book presents a coherent and well-balanced collection of revised papers focusing on agent-mediated knowledge management. Most of the papers are extended and improved versions of work presented at the Symposium on Agent-Mediated Knowledge Management, AMKM 2003, held during the AAAI Spring Symposium in Stanford, CA, USA in March 2003; also included are 3 special articles, including a detailed introduction to the topic by the volume editors. The 28 papers are organized in topical sections on collaboration and peer-to-peer support - agent-based community support - agent models for knowledge and organizations - context and personalization - ontologies and semantic Web - agents and knowledge engineering.