- American Institute of Architects1
- American Institute of Architects. Women in Architecture1
- American Music Center (New York, N.Y.)1
- American Political Items Collectors1
- American Public Transportation Association1
- American Public Transportation Association
1
- American Rhododendron Society1
- American Studies Program2
- Amherst, Jeffery Amherst, Baron, 1717-17971
- Amiss family1
- Amory, Thomas D. (Thomas Dwyer), 1893-19181
- Anderson, Clinton Lee1
- Anderson, Dice Robins1
- Anderson, Eleanor Copenhaver, 1896-19851
- Anderson, Maggie1