We summarize both the study of CP violation with K and B mesons, as well
as rare decays of kaons, emphasizing recent developments. The topics discussed
include the unitarity triangle, ϵ′/ϵ, K→πννˉ and
other rare K decays, T-odd asymmetries in kaon physics, theoretical aspects
of CP violation in B decays, B→J/ΨKS, B→ππ, B→πK and
inclusive CP asymmetries.Comment: Plenary talk at EPS-HEP99, Tampere, Finland, 21 pages, 6 figure