- Alsop, Joseph, 1910-19892
- Alsop, Marin1
- Altay, Fahrettin1
- Alter, Gerald M1
- Alter, Robert1
- Alter-Ciné, Inc.2
- Altham, Keith1
- Altier, Charles1
- Altman, Dorothy1
- Altman, Dorothy (Radio producer)1
- Altman, Laurie, 1947-1
- Altmeyer, Arthur J. (Arthur Joseph), 1891-19721
- Alumni Federation of Columbia University1
- Alva, Margaret, 1942-1
- Alvarez Silva, Hector1
- Alvarez, Celia2
- Alvarez, Daniel (Television personality)1
- Alvarez, José Alberto1
- Alvarez, Santiago, 1919-19981
- Alves, Rubem A., 1933-20141
- Alvin H. Perlmutter, Inc.1
- Amacher, Maryanne1
- Amacker, Robert, 1944-1
- Amato, Bruno1
- Amaya Distribution (Firm)1
- Amaya, Mario2
- Ambassador's Maid (Musical group)1
- Ambrose, George1
- Amen, John Harlan, 1898-19601
- Amendola, Barbara Banks4
- American Academy of Religion5
- American Academy of Religion. Conference (1976: St. Louis, Mo.)1
- American Association of University Women2
- American Brass Quintet1
- American Broadcasting Companies. ABC Radio1
- American Bureau for Medical Aid to China1
- American Composers Alliance1
- American Composers Orchestra1
- American Documentary Films1
- American Documentary, Inc.1
- American Forces Network6
- American Friends Reconstruction Unit1
- American Friends Service Committee3
- American Institute of Architects5
- American Institute of Architects. Detroit Chapter1
- American Institute of Architects. Florida Association1
- American Institute of Planners1
- American Israel Public Affairs Committee1
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- American Recording Society Orchestra40
- American Society of University Composers3
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- Ames, David1
- Ames, Genie1
- Amin, Samir1
- Amiri Baraka's Blue Ark (Musical group)2
- Amirian, Adrianne2
- Amitay, Morris J., 1936-1
- Amnesty International USA1