2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/674Some topics in the theory of jets are reviewed. These include jet precession, unconfined jets, the origin of knots, the internal shock model as a unifying theme from protostellar jets to Gamma-ray bursts, relations between the Blandford-Znajek and MHD disk-wind models, and jet collimation in magnetic acceleration models.To appear in Highly Energetic Physical Processes .... (IAU Symp 195) P. C. H. Martens and S. Tsuruta, edsAstrophysicstext