Precision measurements of low-energy observables provide stringent tests of
the Standard Model structure and accurate determinations of its parameters. An
overview of the present experimental status is presented. The main topics
discussed are the muon anomalous magnetic moment, the asymptotic freedom of
strong interactions, the lepton universality of gauge couplings, the quark
flavour structure and CP violation.Comment: 12 pages, 6 Postscript Figure