Use and development of database and expert systems can be found in all fileds of computer science. The aim of this book is to present a large spectrum of implemented or newly developed database and expert systems. Contributions cover new requirements, concepts for implementations (eg languages, models, storage structures), management of meta data, system architectures, and experiences gained by using traditional databases in as many areas of applications as possible (at least in the fields listed). The aim of the book is to inspire a fruitful dialogue between development in practice, users of database and expert systems, and scientists working in the field.