2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/39364These lectures provide an introduction to various topics in heavy-flavor physics. We review the theory and phenomenology of heavy-quark symmetry, exclusive weak decays of $B$ mesons, inclusive decay rates, and some rare $B$ decays.52 pages, 15 figures, used sprocl.sty (included). Lectures given at the Trieste Summer School in Particle Physics, Trieste, Italy, 21 June-9 July, 1999High Energy Physics - Phenomenologytext