| Y 3.T 17 | Tariff Commission (1882) |
| Y 3.T 17/2 | Tariff Board (1909-1916) |
| Y 3.T 19 | Board of Tax Appeals (1924-1942) |
| Y 3.T 22 | National Commission of Technology, Automation, and Economic Proress (1964-1966) |
| Y 3.T 22/2 | Office of Technology Assessment (1972-1995) |
| Y 3.T 25 | Tennessee Valley Authority (1933- ) |
| Y 3.T 36 | Thomas Jefferson Memorial Commission (1936-1939) |
| Y 3.T 55 | Commission to Investigate Purchase of American-Grown Tobacco by Foreign Governments (1912-1914) |
| Y 3.T 64 | National Tourism Resources Review Commission (1971-1973) |
| Y 3.T 67 | East-West Foreign Trade board (1975-1981) |
| Y 3.T 68 | Transportation investigation and Research Board (1940-1944) |
| Y 3.T 68/2 | National Transportation Policy Study Commission (1976-1979) |
| Y 3.T 79 | Tuberculosis Committee (1906) |
