- Post-War Economic Policy and Planning, Special Committee on, House20
- Post-War Economic Policy and Planning, Special Committee on, Senate17
- Post-War Military Policy, Select Committee on, House9
- Postage on 2d-Class Mail Matter and Compensation for Transportation of Mails, Joint Committee on13
- Postal Commission (Congress)6
- Postal Rate Commission5
- Postal Rates Special Joint Subcommittee10
- Postal Salaries Joint Commission6
- Postal Savings Division9
- Postal Savings System99
- Postal Service14
- Postal Service Joint Commission21
- Postal Service, Commission to Investigate676
- Postal Transportation Service83
- Postmaster-General, 1st Assistant13
- Postmaster-General, 2d Assistant16
- Postmaster-General, 3d Assistant12
- Postmaster-General, 4th Assistant8
- Postwar Immigration and Naturalization, Select Committee to Investigate and Study Laws and Problems Relating to, House1
- Powder Inspector1