  Using supersymmetric grand unified theories, we have recently invented a
framework which allows the prediction of three quark masses, two of the
parameters of the Kobayashi-Maskawa matrix and tan $\beta$, the ratio of the
two vevs. These predictions are used to calculate $\epsilon$ and $\epsilon'$ in
the kaon system, B meson mass mixing and the size of CP asymmetries in the
decays of neutral B mesons to explicit final states of given CP.
