2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/5285Relativistic outflows are a common phenomenon in accreting black holes. Despite the enormous differences in scale, accreting stellar-mass black holes (X-ray binaries, collapsars) and super-massive black holes produce jets with analogous physical properties. Here I review microquasars as sources of relativistic jets, gamma-rays, cosmic rays, and high energy neutrinos.10 pages, 2 figures. Invited review at the IAU Symposium No.214: High Energy Processes and Phenomena in AstrophysicsAstrophysicstext