It succinctly describes the essential elements of key knowledge and skills necessary to become a software architect. Starting from a general understanding of the structure and attributes of quality through technical issues like middleware components and service-oriented architecture for the latest technologies such as model-driven architecture, software product lines, aspect-oriented design, and the Semantic Web, which is expected to affect future devices system software. The second edition contains new material which includes enterprise architecture, agile development, enterprise service bus technology, calm Web services, and a case study on how to use the integration framework Medici. All approaches are illustrated by concrete examples is in progress. So if you work as an architect or senior designer (or want to someday), or if you are a student in software engineering, here is a valuable source of knowledge and has not been approached to you.