What are the four major social groups in the barns system?

The four major social groups in the barns system typically include the owners or managers, who oversee operations; the workers or laborers, who handle the day-to-day tasks; the suppliers, who provide feed, equipment, and other necessary resources; and the customers, who purchase the products produced by the barn, such as livestock or crops. Each group plays a crucial role in the overall functioning and success of the barn system.