2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/201353I discuss the motivations for, and the status of, precision calculations for the Large Hadron Collider (LHC) and the planned International Linear Collider (ILC).latex, uses ws-ijmpe.cls, 19 pages, 9 figures, 1 table, based on a talk given at the symposium "50 Years of High Energy Physics at UB", to appear in International Journal of Modern Physics EHigh Energy Physics - Phenomenologytext