Under the definition the “enterprise” includes all related activities performed through “common control” for a common business purpose. The word “control” may be defined as the act of fact of controlling; power or authority to control; directing or restraining domination. “Control” thus includes the power or authority to control. In relation to the performance of the described activities, the “control,” referred to in the definition in section 3(r) includes the power to direct, restrict, regulate, govern, or administer the performance of the activities. “Common” control includes the sharing of control and it is not limited to sole control or complete control by one person or corporation. “Common” control therefore exists where the performance of the described activities are controlled by one person or by a number of persons, corporations, or other organizational units acting together. This is clearly supported by the definition which specifically includes in the “enterprise” all such activities whether performed by “one or more corporate or other organizational units.” The meaning of “common control” is discussed comprehensively in part 776 of this chapter.