Effectively, the two fields of peer-to-peer computing and grid computing collectively form the de facto basis for the methodologies and techniques that need to be used to develop performance-driven service-oriented software platforms capable of satisfying key aspects of quality of service. The Handbook of Research on P2P and Grid Systems for Service-Oriented Computing: Models, Methodologies, and Applications addresses the need for peer-to-peer computing and grid paradigms in delivering efficient service-oriented computing. This critical mass of the most sought after research serves as a collection of chapters facilitating a broad understanding of the subject matter useful to researchers and doctoral students working specifically in the deployment, implementation, and study of related topics including distributed computing, software engineering, Web services, and modeling of business processes.