  A comprehensive overview of kaon decays is presented. The Standard Model
predictions are discussed in detail, covering both the underlying
short-distance electroweak dynamics and the important interplay of QCD at long
distances. Chiral perturbation theory provides a universal framework for
treating leptonic, semileptonic and nonleptonic decays including rare and
radiative modes. All allowed decay modes with branching ratios of at least
10^(-11) are analyzed. Some decays with even smaller rates are also included.
Decays that are strictly forbidden in the Standard Model are not considered in
this review. The present experimental status and the prospects for future
improvements are reviewed.
