What you may call basic SOA or IT - centric SOA applies SOA principles to the flexible integration of an enterprise IT portfolio. But controlling interactions through well-defined services and interfaces certainly applies to mobile, social, cloud, and Big Data solutions as well. SOA is simply good design for IT integration and for the business solutions of an ever-more-connected and ever-more-distributed world. This book is a guide to applying the design principles of SOA to the business problems of today.