A business may be privately owned in three different forms. These forms are the sole proprietorship, the partnership and the corporation. The sole proprietorship is the most common in many western countries. For example, more than 80 per cent of all businesses in the United States are sole proprietorships. But it is evident that sole proprietorships do not do the greatest volume of business. They account for only 16 percent of all business receipts, for example, in America. What kind of business is likely to be a sole proprietorship? First of all, service industries such as laundromats, beauty shops, different repair shops, restaurants.