- Abraham Anson papers, 1939/200528
- Adams T. Rice papers, 1922/19604
- Alexander Haight family collection, 1764/19764
- Alexander Haight family collection, 1764/19777
- American Political Items Collectors collection7
- American Political Items Collectors collection, 1895/19881
- American Public Transportation Association records, 1898/1999350
- American Public Transportation Association records, 1950/19801
- American Theatre Association records5
- Arena Stage records, 1949/2010150
- Armistead L. Boothe collection, 1920/198314
- Arnold Goldman Living Newspaper collection, 1931/19738
- Arnold Sundgaard papers, 1925/1988178
- Arthur E. Scott photograph collection46
- Arthur E. Scott photograph collection, 1910/197647