2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/51956Use of the AdS/CFT correspondence to arrive at phenomenological gauge field theories is dicussed, focusing on the orbifolded case without supersymmetry. An abelian orbifold with the finite group $Z_{p}$ can give rise to a $G = SU(N)^p$ gauge group with chiral fermions and complex scalars in different bi-fundamental representations of $G$. The precision measurements at the $Z$ resonance suggest the values $p = 12$ and $N = 3$, and a unifications scale $M_U \sim 4$ TeV. Robustness and predictivity of such grand unification is discussed.11 pages latex, one eps figure. Plenary Talk at SUGRA 20, Northeastern University, March 2003High Energy Physics - Theorytext