- Alaska Railroad, Special Select Committee on Investigation of, Senate1
- Alaska Railroad, Special Select Committee to Investigate, Senate1
- Alcoholic Liquor Traffic Committee8
- American Historical Association1
- American Merchant Marine, Special Committee to Investigate Conditions in, Senate1
- American Retail Federation, Special Committee to Investigate, House6
- American Small Business, Special Committee to Study Problems of, Senate138
- American Sugar Refining Company, Special Committee on Investigation of5
- Appropriations Committee799
- Appropriations Committee, House1,105
- Appropriations Committee, Senate901
- Arlington Memorial Amphitheater Commission8
- Arlington Memorial Bridge Commission7
- Armed Services Committee, House760
- Armed Services Committee, Senate300
- Armor Plant, Special Committee to Investigate Cost of2
- Atomic Energy Joint Committee7
- Atomic Energy, Special Committee on, Senate8
- Baltic States Incorporation into U. S. S. R., Select Committee to Investigate, House1
- Banking and Currency Committee347