Context-aware systems are a group of systems that are self-aware with regard to their physical environment and behave according to the conditions that are imposed by their physical setting. Context-awareness, or ubiquitous computing is a budding field of computer science and seeks to create highly personalized, intelligent systems that can closely follow the user in his/her day to day activities. This book on context-aware systems and applications puts together the latest research that has taken place in this field. It presents the complex subject of context-aware systems in the most comprehensible and easy to understand language. It will help the readers in keeping pace with the rapid changes in this field. This book is a resource guide for experts as well as students.