2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/40026I discuss topics of particular interest in connection with the ongoing experiments at the B factories BaBar and Belle: B-mixing, QCD effects in nonleptonic decays and rare decays.Plenary Talk given at IVth Rencontres de Vietnam, Hanoi, July 2000; 10 pagesHigh Energy Physics - Phenomenologytext