  In this lectures, we give a review about the Minimal Supersymmetric Standard
Model (MSSM) and the General Singlet Extensions of the MSSM (GSEMSSM). We,
first introduce the minimal set of fields to built both models. Then we
introduce their superfields and using them we build the lagrangian of those
models in the superspace formalism. We show how to get the mass spectrum of
those model in the $R$-parity scenarios and we also show how to get some
Feynman Rules with the Gauge Bosons.
