| 1933 | Born in Göttingen |
| 1954 | Study of Communication Engineering, Technische Universität Berlin |
| 1960 | Diploma (Intermediate Frequency Stabilization for Solid State Laser) |
| 1960 | Research Assistent (Computerized Air Traffic Control, Surveillance Radar Tracking, and Flight Identification) Prof. Dr. W. Haack |
| 1964 | Doctoral Degree (Associative Storing) |
| 1964 | Manager, Large Scale Computer Development, AEG-Telefunken (By 1970, TR 440 is the most powerful computer ever built in Europe) |
| 1972 | Professor at the Universität Hamburg (Chair of Computer Organisation) |
| 1974-today | Advisor to German Research Foundation (DFG), GMD (joined with Fraunhofer-Gesellschaft), Federal Ministry of Education and Research (BMBW/F) |
| 1977 | Professor at the Universität der Bundeswehr, München |
| 1978 | Professor at the Universität Hamburg |
| 1983 | Professor at the Technische Universität München (Chair of Performance Evaluation, Computer Architecture, Networks, Automated Reasoning) |
| 1984 - 1990 | Member of the Executive Board and President of Germany`s National Research and Education Network (DFN-Verein, Deutsches Forschungsnetz) |
| 1994 - 1996 | Vice-President of Technische Universität Muenchen (Strategy Planing, Foreign Relations, Central Institutions) |
| 1996 - 2005 | President of DFN-Verein (by 2001, largest scientific network world-wide) |
| 2001 | Professor Emeritus, Technische Universität Muenchen |
| 2004, 2006 | Advisor of the EGEE and BalticGrid Grid Projects |
| 2005 | Fellow of Gesellschaft für Informatik e.V. (GI) |
| 2007 | Member of the University Council, State of Schleswig-Holstein |