Exclusive Production of Neutral Vector Mesons at the Electron Proton Collider HERA O.P We would like to specially O.P We would like to specially thank the organizers of the special sessions: R Für Konzerne ergeben sich daraus Herausforderungen bezogen auf die Abbildung prozessualer Abläufe und eine zielgerichtete IT Unterstützung des Chancen und Risikomanagements This book provides readers who have a general knowledge of the concepts and experimental techniques of elementary particle physics with the information necessary to assess the status of the new investigations prior to the end of 1996 The first five years of operation of the two multi purpose experiments ZEUS and H1 at the HERA electron proton storage ring facility in Hamburg