2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/197164An overview is given of the experimental neutrino mixing results and types of neutrino models proposed, with special attention to the general features of various GUT models involving intra-family symmetries and horizontal flavor symmetries. Many of the features are then illustrated by a specific SO(10) SUSY GUT model formulated by S.M. Barr and the author which can explain all four types of solar neutrino mixing solutions by various choices of the right-handed Majorana mass matrix. The quantitative nature of the model's large mixing angle solution is used to compare the reaches of a neutrino super beam and a neutrino factory for determining the small U_{e3} mixing matrix element.9 pages, 1 figure, invited talk at the NUFACT'01 Workshop in Tsukuba, Japan, 24-30 May 2001High Energy Physics - PhenomenologyHigh Energy Physics - Experimenttext