2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/46682A summary of main results on NB (Negative Binomial) regularity and related clan concept since their first appearance in multiparticle dynamics is presented.LaTeX, 11 pages, uses sprocl.sty, to appear in the Proc. of the XXVI INternational Symposium on Multiparticle Dynamics, Faro, Portugal, September 1st-5th, 1996High Energy Physics - Phenomenologytext