2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/46484Seven next-to-leading order QCD evolution programs are compared. The deviations of the results due to different theoretical prescriptions for truncating the perturbative series are clarified, and a numerical agreement between five codes of better than 0.1% is achieved. Reference results for further comparison are provided.11 pages LaTeX, 4 eps-figures. To appear in the proceedings of the workshop "Future Physics at HERA", DESY, Hamburg, 1996High Energy Physics - Phenomenologytext