2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/204186Selected applications of perturbative Quantumchromodynamics (QCD) to predictions of the Standard Model for processes at high energy colliders are reviewed with emphasis on past successes and future problems. This is a personal retrospective is not intended to be a comprehensive review of the field.18 pages, 12 figures, contribution to the Symposium: 50+ Years of High Energy Physics at UB, University at Buffalo, October 20-21, 2006. Added references in section 4High Energy Physics - Phenomenologytext