independent agency vs United States Post Office

Other hyponyms of independent agency include NRC, Nuclear Regulatory Commission, E.P.A., Environmental Protection Agency, EPA, Federal Emergency Management Agency, FEMA, Central Intelligence Agency, CIA, ICC, Interstate Commerce Commission, NASA, National Aeronautics and Space Administration, NARA, National Archives and Records Administration, National Labor Relations Board, NLRB, National Science Foundation, NSF, Postal Rate Commission, United States Postal Service, US Postal Service, USPS, United States Postal Inspection Service, US Postal Inspection Service, FCC, Federal Communications Commission, Social Security Administration, SSA, PO, Post Office, US Post Office, Federal Trade Commission, FTC, Office of Inspector General, OIG, General Services Administration, GSA, Federal Protective Service, FPS, SBA, Small Business Administration, Selective Service, Selective Service System, SSS, SEC, Securities and Exchange Commission.