- Abraham Anson papers, 1939/200550
- Agnes Wolf papers, 1966/200611
- Alan Bowne papers, 1964/1991, bulk 1980/19895
- Alexander Haight family collection, 1764/19763
- Alexander Haight family collection, 1764/19777
- American Political Items Collectors collection9
- American Political Items Collectors collection, 1895/19881
- American Public Transportation Association records, 1898/1999262
- American Public Transportation Association records, 1950/19801
- American Theatre Association records76
- American Theatre Association records, 1972/19861
- Amy Federman performing arts collection, 1963/20122
- Arden B. Schell Watergate collection760
- Arden B. Schell Watergate collection, 1972/1974761
- Arena Stage records, 1949/20101,030