- A.S. Aloe Company, St. Louis, Missouri3
- ALF-CIO News1
- AMP Inc.1
- AMP Inc., Harrisburg, Pennsylvania1
- Abbey, E. C. (Emery C.), 1832-19024
- Abeel, David8
- Abraham Bogardus1
- Acme Newspictures (New York, N.Y.)1
- Acmegraph Company11
- Adams, John Kenneth.1
- Adams, John Quincy, 1767-18481
- Adler, Willy Moritz, 1920-3
- Aerial Photography Services3
- African Methodist Episcopal Church. Council of Bishops.1
- Ahrens, Henry H.4
- Aiken, William Martin9
- Aimar, G.W.1
- Aivaliotis, Georgianna1
- Albertype Co., Brooklyn, N.Y1
- Albertype Company5