2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/207702Using precision electroweak data, we put limits on non-commuting extended technicolor models. We conclude that these models are viable only if the ETC interactions are strong. Interestingly, these models predict a pattern of deviations from the standard model which can fit the data significantly better than the standard model does, even after taking into account the extra parameters involved.figures on hep-ph replaced with working versions! 20 pages, latex, 3 figures, figures also available at http://smyrd.bu.edu/htfigs/htfigs.htmlHigh Energy Physics - Phenomenologytext