A typical corporate structure consists of various departments that contribute to the company's overall mission and goals. Common departments include Marketing, Finance, Operations management, Human Resource, and IT. These five divisions represent the major departments within a publicly traded company, though there are often smaller departments within autonomous firms. Many businesses have a CEO and a Board of Directors, usually composed of the directors of each department, potentially with the addition of one or more non-executive directors. There are also company presidents, vice presidents, and CFOs. However, there is a great diversity in corporate forms, as enterprises range from single company to multi-corporate conglomerate. The four main corporate structures are Functional, Divisiona