2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/42883We briefly review some of the recent developments in QCD spin physics.14 pages, LaTeX, 9 figures as eps files. Invited plenary talk presented at the "XIth International Workshop on Deep Inelastic Scattering (DIS 2003)", St. Petersburg, Russia, April 23-27, 2003High Energy Physics - Phenomenologytext