Beyond the Standard Model

This is a series of introductory lectures on different topics which involve generalizations of the Standard Model as well as theories atempting the unification of all particle interactions. This includes a brief discussion of non-perturbative approaches as well as an introduction to topics like u-masses, Grand Unification models and their supersymmetric generalizations. The construction of the Minimal Supersymmetric Standard Model is discussed in some detail and possible alternative supersymmetric models are briefly reviewed. Finally, some general aspects of Superstring Unification are described with emphasis on possible phenomenological applications of those ideas.