; and (2) submit to Congress a report on the results of such study. 6. Definitions In this Act: (1) Executive agency The term Executive agency means the following: (A) An Executive department (as defined in section 105 of title 5, United States Code). (B) Environmental Protection Agency. (C) National Aeronautics and Space Administration. (D) Agency for International Development. (E) General Services Administration. (F) National Science Foundation. (G) Nuclear Regulatory Commission. (H) Office of Personnel Management. (I) Small Business Administration. (J) Social Security Administration. (2) Category management The term category management means a business practice for reducing duplication in contracting, more effectively leveraging the buying power of the Federal Government, and promoting the use of best-in-class solutions and practices throughout the Federal Government. (3) Common The term common means, when used with respect to a good or service, that such good or service is— (A) procured by all or most Executive agencies; (B) not unique to the mission of an individual Executive agency; (C) interchangeable between Executive agencies; and (D) generally available commercially. (4) Director The term Director means the Director of the Office of Management and Budget. (5) spend under management The term spend under management means the number equal to the quotient obtained by dividing— (A) the total spending on preferred Governmentwide contract vehicles; by (B) the total spending on all Governmentwide contract vehicles.