2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/37287In these lectures I introduce the basics of HERA physics and give a survey of the major aspects, discussing in somewhat more depth the subject of low $x$ physics.52 pages, 42 figures; Lectures delivered at 7th Hellenic School on Elementary Particle Physics, Corfu Summer Institute, September 2001High Energy Physics - Experimenttext