This book introduces an original and far-reaching industry technology: Business Services Orchestration. BSO is the art of orchestrating the interactions between business services that may represent internal business processes of organizations. Waqar Sadiq and Felix Racca show how BSO enables information technology professionals to develop and design efficient business systems. In Section I they describe an in-depth architecture and methodology for modeling the BSO. Section II focuses on technologies, ranging from component models to programming languages to various kind of protocols. A case study in Section III explains how to apply orchestration to an actual business process.