A corporation is a separate legal entity that exists independently from its owners. A corporation is created and comes into existence when articles of incorporation (charter or certificate of incorporation in certain states) are filed with the prescribed fees, and accepted by the proper state authority.
A corporation is owned by stockholders. While stockholders do not directly manage the corporation, they influence corporate decisions through indirect actions such as electing and removing directors, approving or disapproving amendments to the articles of incorporation and voting on important corporate decisions.
The members of the Board of Directors are responsible for managing the affairs of the corporation. Usually, directors make only major business decisions, however they supervise and appoint officers who make the
day-to-day business decisions of the corporation.
Officers are responsible for the everyday management of the corporation. Typically, officers are appointed directly by the Board of Directors.
A stockholder may serve on the Board of Directors and also be an officer of the corporation. In fact, in most states one person is enough to form a corporation, and that person can be the sole officer, director and stockholder.