There are many different methods to conduct specific businesses, but most businesses are grouped by market. Some businesses happen to be small and aimed at a single industry, while others happen to be large enterprises that period several market sectors. A great sort of this would be the retail huge Walmart or Apple. Firms define their businesses by industry, including mattress creation, advertising, and real estate. Companies are defined the chosen type of trades they perform. ExxonMobil performs business by giving oil to about his the customers.