- 1x1 Japan Exhibition Materials, 1965-2024, 20241
- A. E. Dick Howard papers, 1928/20177
- A. H. Hand Papers, 1835/20091
- A. J. Gustin Priest papers, 1919/19764
- A. L. McLeod Papers, 1964/19661
- A. Patrick L. Prest, Jr. papers, 1941/201413
- A. Rufus Tonelson Papers, 1922/197512
- A. Willis Robertson Papers, 1921/1988, bulk 1946/19661,191
- Abbye A. Gorin Architectural Collection, 1940/2006, bulk 1995/20061
- Abraham Anson papers, 1939/200586
- Academic Departments - Record Group 91
- Adagio Press Collection, 1957/19933
- Adalbert J. Volck Collection of Etchings, 1861/19793
- Adam Empie Papers, 1811/2004, bulk 1811/18502
- Addison H. Smith papers, 1917/1970, bulk 1917/19222