2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/121780In this talk, I have reviewed few recent models on neutrino masses and mixing. Particularly, I have emphasised on $A_4$ symmetric models.11 pages, no figures, Plenary Talk given at DAE-BRNS High Energy Physics Symposium, Indian Institute of Technology, Kharagpur, India,December 2006High Energy Physics - Phenomenologytext