The late 1800s, the bessemer process was used in banking systems. electrical power. steel production. stock exchanges. s was used in

Steel production.

Explanation:

Before the invention of the open hearth furnace, the Bessemer process was the first low-cost industrial process for the mass production of steel out of molten pig iron. Its fundamental function is the extraction of pollutants from the iron by oxidation with air blowing within the molten iron. The oxidation increases the heat of the iron mass and makes it molten. It´s named after its inventor, Henry Bessemer.