Received a Dr. rer. nat. degree in physics from the Technical UniversityMunich/Germany in 1968; worked in industrie/research institutes at the central laboratories of Siemens AG between 1963 and 1968, at Bell Northern Research Ltd in Ottawa/Canada between 1969, and 1972 at the Gesellschaft fuer Mathematik und Datenverarbeitung in St. Augustin/Germany between 1973 and 1978; became an associate professor of computer science at the University of Bonn/Germany in 1978; became a full professor of computer science at the University of Kiel/Germany retired in 2003.