Service Oriented Architecture (SOA) is an architectural approach to organize and manage various processes where components work seamlessly with each other. From the software engineering point of view, SOA an architectural pattern in computer software design in which reusable well-defined application components provide services to other components via a communications protocol, typically over a network. The principles of service-orientation are independent of any vendor, product or technology. It provides platform, technology and programming language independence to achieve great flexibility of a solution. SOA is very much related to Cloud Computing, which in turn is a buzzword that means different things to different people. This course will provide practical introduction to SOA; SOAP and RESTful Web Services; Cloud Computing and Web Service related Security and Access Control issues.