SIDOR
 Siderúrgica de Orinoco C.A. Alfredo Maneiro (Sidor) is the biggest Venezuelan steel corporation. The company is situated in an industrial zone in Ciudad Guayana Bolívar State near the Orinoco River. Major iron deposits were found in the area in 1926 and 1947. The plant was designed to make use of hydro-electricity from the river Caroni.