2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/49383We discuss forward jet production data recently published by the H1 and ZEUS collaborations at HERA. We review how several Monte-Carlo models compare to the data. QCD calculations based on the BFKL formalism and on fixed NLO perturbation theory with and without resolved virtual photons are described.10 pages, 4 eps figures; talk given at the Ringberg Workshop 'New Trends in HERA Physics 1999'High Energy Physics - Phenomenologytext