  The minimal supersymmetric extension of the Standard Model (MSSM) is
reviewed. In the most general framework with minimal field content and R-parity
conservation, the MSSM is a 124-parameter model (henceforth called MSSM-124).
An acceptable phenomenology occurs only at exceptional points (and small
perturbations around these points) of MSSM-124 parameter space. Among the
topics addressed in this review are: gauge coupling unification, precision
electroweak data, phenomenology of the MSSM Higgs sector, and supersymmetry
searches at present and future colliders. The implications of approaches beyond
the MSSM are briefly addressed.
