Just as a word processing application sits on top of an operating system such as Microsoft Windows, mySAP ERP rests on top of a technology platform called SAP NetWeaver. To understand the full potential of mySAP ERP, you need to appreciate its power. The chapters in this part introduce you to SAP NetWeaver, look at how it behaves in designing and running applications, and go further into how you work with services. Finally, we look at the world of composite applications; using these, you can orchestrate functionality from several applications to make technology better support your business processes.