Part I Variability Management.- Software Product Line Engineering.- Variability Modeling.- Variability Scope.- Binding Time and Evolution.- Variability Implementation.- Variability Realization Techniques and Product Derivation.- Visualizing Software Variability.- Variability in the Software Product Line Lifecycle.- Part II Research and Commercial Tools.- COVAMOF.- PLUM - Product Line Unified Modeller Tool.- FaMa.- Part III Industry Experiences.- Philips Healthcare Compositional Diversity Case.- Variability in Power Plan Control Software.- Second Generation Product Line Engineering - A Case Study at General Motors.- Part IV Emerging and Research Topics in Software Variability.- Dynamic Software Product Lines.- Variability in Autonomic Computing.- Variability in Web services.- Service-Oriented Product Lines.- Software Variability and Design decisions.- Variability and Aspect Orientation.