2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/46985I would like to discuss $D^0-\bar{D}^0$ the mixing and rare D decays as manifestations of Flavor Changing Neutral Currents (FCNC) in the charm sector. I will first review the expectations in the Standard Model (SM) and then summarize some typical expectations in new physics scenarios. I would like to argue that the charm case offers a large window of opportunity and it may be possible to learn something about the origin of the fermion mass matrix.9 pages, LATEX, World Scientific conference proceedings. Talk presented at the FCNC 97 Conference in Santa Monica, Feb. 19-21,1997High Energy Physics - Phenomenologytext