- "We Were Not Shadows" by Colonel E.P.J. Ryan, O.B.E typed manuscript, 1955/19651
- Abraham Anson papers, 1939/200556
- Alan Bowne papers, 1964/1991, bulk 1980/19893
- Alexander Haight family collection, 1764/19764
- Alexander Haight family collection, 1764/19778
- American Political Items Collectors collection13
- American Political Items Collectors collection, 1895/19881
- American Public Transportation Association records, 1898/1999363
- American Public Transportation Association records, 1950/19801
- American Theatre Association records14
- Amy Federman performing arts collection, 1963/20122
- Arena Stage records, 1949/2010440
- Armistead L. Boothe collection, 1920/198314
- Arnold Goldman Living Newspaper collection, 1931/19738
- Arnold Sundgaard papers, 1925/1988228