Software is at the heart of all computerized systems, from real-time embedded systems to automated supply chain management. The increasing complexity of software systems requires systematic methods and supporting tools for analysis and design. Besides computerized systems, there is also a need to develop computation models and software tools for studying other types of systems, such as natural systems and social systems. A special interest of our department is the application of computer modeling and simulation to studying these systems' complex behaviors. Faculty members in the software systems area are researching advanced computation models, development methods, and software environments for studying and/or designing systems in various application domains.