2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/123882Planar equivalence between supersymmetric Yang--Mills theory and its orientifold daughters is a promising tool for explorations of nonperturbative aspects of quantum chromodynamics. Taking our 2004 review as a starting point we summarize some recent developments in this issue.13 pages, 5 figures. A mini-review in honor of Gabriele Veneziano's 65-th birthday; v.2: Ref. [11] correctedHigh Energy Physics - Theorytext