a R. Fleischer, T. Hurth, M. L. Mangano Physics Department, CERN, 1211 Geneva, Switzerland In the history of quantum and particle physics, discrete system. In this past decade, the key player has been the B-meson system, and we also witnessed the appearance on symmetries and their violation have played an outstanding + ? role. First, the assumption of the conservation of P (parity), stage of the top quark. Thanks to thee e B factories with C (charge conjugation), CP and CPT (T denotes time rever- their detectors BaBar (SLAC) and Belle (KEK), CP vio- tion is now also rmly seen in B-meson...