- "More Than the Sum of Our Body Parts: An Exhibit by CARY, 1992-1993", 1934/20001
- "Smart" Road Citizen's Advisory Committee Records, 1993/199712
- 1x1 Japan Exhibition Materials, 1965-2024, 20245
- A. J. Davis Family Collection, 1874/2007, bulk 1874/19071
- A. Jane Duncombe Architectural Papers, 1952/20024
- Abbye A. Gorin Architectural Collection, 1940/2006, bulk 1995/20062
- Al Gross Papers, 1909/200013
- Alfred C. Payne Collection, 1917/200351
- Alleghany Chapter, National Society of the Daughters of the American Revolution Records,, 1890/202210
- American Egg Board Collection, 1974/200413
- American Work Horse Museum Collection,, 1971/19992
- Andrea Maxine Lucas Architectural Collection, 1980/200313
- Ann A. Hertzler Collection, 1863/2013, bulk 1974/200025
- Anna P. Sokolina Architectural Collection, 1924/20196
- Anne Griswold Tyng Architectural Collection, 1969/19991