- Anne H. Price Yates Papers, 1904/1985, bulk 1975/19853
- Anne Price Yates Papers II, 1898/20054
- Annie M. Hale Sheet Music Collection, 1892/19873
- Antoine Gaujot and Julien E. Gaujot Papers, 1840/19995
- Architectural League of New York: Archive of Women in Architecture Records, 1892/19767
- Arthur B. Massey Papers, 1902/19612
- Arthur M. Squires Papers, 1888/1987, bulk 1940/1987221
- Arthur W. Grove Family Papers, 1900/19571
- Association for Women in Architecture Records, 1928/199213
- Association for the Preservation of Virginia Antiquities, Montgomery County Branch Papers, 1754/1996, bulk 1958/19838
- Avery-Abex Metallurgical Collection, 1920/19871
- Aviation Brochures and Pamphlets Collection, 1910/19582
- Bailey-Law Collection, 1825/197187
- Baughman Family Papers, 1837/19683
- Beattie Family University Memorabilia, 1875/19592