Current issues in CP violation

A brief review of CP violation in K and B decays is given. While the observables ε and Re(ε'/ε) describing CP violation in neutral K decays do not allow a powerful test of the CKM mechanism of CP violation, rare K→πνν-bar decays and in particular the B-meson system are much more promising in this respect. After a brief look at the K system, selected aspects of CP-violating effects in B decays are discussed. It is pointed out that combined branching ratios for B→πK modes, which have been observed recently by the CLEO collaboration, may allow to derive stringent constraints on the CKM angle γ that could open a window to new physics