2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/49611A condensed survey of various aspects of LEP 1 physics is presented with a critical examination of the ingredients that are available for theoretical predictions. A prototype of comparisons for 2f calculations can be found in hep-ph/9902452.16 pages(Latex). To appear in the Proceedings of "XIVth International Workshop: High Energy Physics and Quantum Field Theory (QFTHEP99)", Moscow, Russia, 27 May - 2 June 1999High Energy Physics - Phenomenologytext