Collection
- Adele C. Brockhoff letters, 1946-19811
- Adolf K. Placzek papers, 1932-20001
- Adolph Oko collection of Spinoza materials, 1610-1958, bulk 1914-19581
- Adriaan Jacob Barnouw papers, 1895-19671
- Advanced Papyrological Information System records, 1996-20141
- Adál Maldonado papers, 1972-20201
- Agatha Young manuscripts, 1960-19651
- Agnes Kun and Antal Hidas Papers, 1915-19871
- Agudath Israel Records, 1933-2008, bulk 1940-19471
- Air Force ROTC photograph collection, 1955-19561
- Al Jaffee Papers, circa 1900-20191
- Al Mutanabbi Street Starts Here collection, 2007-20191
- Alan Alexander Milne letters, 1918-19191
- Alan Brinkley papers on Henry R. Luce, 1910-2009, bulk 1922-19651
- Alan Cameron papers, 1959-20201
- Alan H. Kempner papers, 1809-19811
- Alan K. Young: My Brief Mystery-Writing Career, 1967-19801
- Alan Levy Papers, 1950-20071
- Alan Sillitoe letters, 1959-19741
- Albert Ellis papers, 1920-2007, bulk 1965-19971