There are many different ways to conduct individual businesses, resource but many businesses are categorized by sector. Some businesses happen to be small and preoccupied with a single market, while others will be large companies that duration several industries. A great sort of this would be the retail giant Walmart or Apple. Companies define their businesses by simply industry, including mattress production, advertising, and real estate. Web based defined by the type of deals they accomplish. ExxonMobil performs business by providing oil to the customers.