  The successes and shortcomings of the Standard Model are reviewed, with
emphasis on the reasons motivating the need to extend it. The basic elements of
grand unification and supersymmetry are described, exploring their
phenomenological implications for gauge coupling unification, proton decay,
fermion masses, neutrino physics, collider signatures, dark matter, rare decays
and anomalous magnetic moments. The forthcoming generation of experiments will
certainly expose these ideas to several essential tests.
