Trends in Distributed Systems: Towards a Universal Service Market : Third International IFIP GI Working Conference USM 2000 Munich Germany September 12 14 2000 Proceedings This book constitutes the refereed proceedings of the Third International IFIP GI Working Conference on Trends Towards a Universal Service Market USM 2000 held in Munich Germany in September 2000. The 28 revised full papers presented together with three invited papers were carefully reviewed and selected from numerous submissions. The papers are organized in topical sections on electronic auctions and trading Internet based service markets quality of service mobile and distributed services middleware architectures service management mobile agents and applications and trends in data and telecommunications