2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/47533The following topics in perturbative QCD are reviewed: recent theoretical progress in higher-order calculations; soft-gluon resummation for hard-scattering processes at large $E_T$ and high $x$; low-$x$ behaviour of structure functions and recent theoretical results on BFKL dynamics; infrared renormalons and power corrections to perturbative predictions; updated summary of $\as$ measurements.32 pages, LaTex, uses lprocl.sty, 15 ps figuresHigh Energy Physics - Phenomenologytext