5 U.S.C. § 4501

For the purpose of this subchapter— (1) “agency” means— (A) an Executive agency; (B) the Library of Congress; (C) the Office of the Architect of the Capitol; (D) the Botanic Garden; (E) the Government Publishing Office; (F) the government of the District of Columbia; and (G) the United States Sentencing Commission; but does not include— (i) the Tennessee Valley Authority; or (ii) the Central Bank for Cooperatives; (2) “employee” means— (A) an employee as defined by section 2105; and (B) an individual employed by the government of the District of Columbia; and (3) “Government” means the Government of the United States and the government of the District of Columbia.