[en] The role of supersymmetry and supergravity in particle physics is reviewed. Particular attention is given to the properties of stable superpartners in the various models. The authors discuss two schemes for producing realistic supersymmetric models. In the first, LESS, ordinary matter couples to the supersymmetry breaking as strongly as possible, through the low-energy gauge interactions. In the second, the coupling was as weak as possible, through gravity alone. There are also intermediate possibilities, such as coupling through superheavy matter fields. All these models give similar results at the weak scale