- A Women’s Coffeehouse Collective (1)
- A and D Optimal Oed (1)
- A. F. Moratz Company (Architect) (1)
- A. Moorman and Company (Architect) (7)
- A. Philip Randolph (1)
- Aagaard, George N., 1913 1997 (2)
- Aaker, Harriet (1)
- Aakre, R. B. (1)
- Aaronian (1)
- Aaup (1)
- Abacus (2)
- Abax Corporation (1)
- Abba (1)
- Abbado, Roberto (1)
- Abbe, Ernst C. (Ernst Cleveland), 1905 2000 (1)
- Abbe, Lucy (1)
- Abbott Northwestern Hospital (1)
- Abc Projects (7)
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- Abe's Delicatessen (1)
- Abelson, Rabbi Kassel (2)
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- Aberdeen Proving Ground (Md) Geophysical Laboratory (1)
- Aberman, Bill (1)
- Abernathy, Ralph, 1926 1990 (18)
