This is a comprehensive textbook for teaching and learning SOA concepts. Assuming no prior knowledge of programming languages on the part of the reader, this book contains a rich collection of step- by- step procedures to help one, master the services. Features: Student friendly -- written in a clear, concise and lucid manner; A sincere attempt has been made to introduce the basic concepts of services; Each chapter is organised into small sections that address key topics; Emphasis on in-depth coverage and good style in programming; Aims to motivate the unmotivated; Abundance of programming examples with sample output; Explains the philosophy behind the creation of the concepts and its various features; Covers both elementary as well as advanced concepts; Helps to understand concepts by providing diagrams and program listings wherever necessary; Logical flow of concepts starting from preliminary topics to the advanced topics; Programs for each concept to illustrate its significance and scope; Complete explanation of each program with emphasis on the core segment.