- Abraham Anson papers, 1939/200552
- Agnes Wolf papers, 1966/20063
- Alan Bowne papers, 1964/1991, bulk 1980/19895
- American Political Items Collectors collection10
- American Political Items Collectors collection, 1895/19881
- American Public Transportation Association records, 1898/1999131
- American Public Transportation Association records, 1950/19801
- American Theatre Association records419
- American Theatre Association records, 1972/19861
- Amy Federman performing arts collection, 1963/20122
- Arena Stage records, 1949/20101,064
- Armistead L. Boothe collection, 1920/19838
- Arnold Sundgaard papers, 1925/198838
- Art Attack records, 1979/20094
- Arthur Arundel papers, 1964/19908