This article reviews efforts to integrate existing control systems in a major iron and steel works. Cherepovets accounts for 9% of rolled stock production in the USSR. More than 60 minicomputers, hundreds of microprocessors, and at least 10 mainframes were used to integrate over 1000 subsystems. Recommendations are offered to further automate control systems for various processes, including coking, agglomeration, blast furnace operations, smelting and rolling.