2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/148910We review various features of the $R$-parity breaking phenomenology, with particular attention to the low energy observables, and to the patterns of the $R$-parity breaking interactions that arise in Grand Unified models.LaTeX, 10 pages, 1 LaTeX figure; to appear in the proceedings of the 5th Hellenic School and Workshops on Elementary Particle Physics; minor changes, 1 reference addedHigh Energy Physics - Phenomenologytext