2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/41524We discuss the status of the next-to-next-to-leading order calculation in scattering processes, describing briefly the challenges that have been overcome and what challenges are still to be resolved.4 pages, uses moriond.sty (included). Talk presented at the XXXVII Rencontres de Moriond, QCD and High Energy Hadronic Interactions, Les Arcs, France, 16-23 March, 2002High Energy Physics - Phenomenologytext