This book constitutes the refereed proceedings of the First International Conference on Service-Oriented Computing, ICSOC 2003, held in Trento, Italy in December 2003.The 38 revised full papers presented were carefully reviewed and selected from 181 submissions. The papers are organized in topical sections on service description, service composition, quality of service models, service personalization, service semantics, business processes and transactions, business collaborations, service request and coordination, service security and reliability, infrastructure for service delivery, service...