2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/197501This article contains an overview of some recent attempts at understanding supergravity and string duals of four dimensional gauge theories using the AdS/CFT correspondence. We discuss the general philosophy underlying the various ways to realize Super Yang-Mills theories in terms of systems of branes. We then review some of the existing duals for N=2 and N=1 theories. We also discuss differences and similarities with realistic theories.85 pages, 1 figure; review article published in Rivista del Nuovo Cimento; v2 references addedHigh Energy Physics - Theorytext