Organizational structure refers to the way that a company or organization is set up, including the hierarchy of management, the relationships between different departments, and the roles and responsibilities of employees. For example, a company might have a tall organizational structure, with many levels of management and many different departments, while another company might have a flat structure, with few management levels and fewer departments. An example of a tall organizational structure is a multi-national corporation with a CEO at the top, followed by a president, several vice presidents, directors, managers, and so on, while an example of a flat structure is a small start-up company with a founder and a few employees.