2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/149273We feel that non-commutative geometry is to particle physics what Riemannian geometry is to gravity. We try to explain this feeling.9 pages LaTeX, 2 figures uuencoded and gzipped, writeup of talk in MadeiraHigh Energy Physics - Theorytext