2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/180538We review the present status of theoretical predictions for both closed (J/psi) and open heavy quark production in high energy collisions, and their comparisons to experimental data.8 pages, invited talk given at Quark Matter 2006, Shanghai, China, 14-20 November 2006High Energy Physics - Phenomenologytext