Creator
- Orr, J. L. (James Lawrence), 1822-18731
- Orr, Stephens1
- Osborne Photographers.1
- Osborne Publ. Co. (New York, N.Y.)1
- Osiander, Andreas, 1498-1552, author.1
- Oster, Harry.1
- Our World Foto.1
- Out-Door Photography.1
- Overly, Charles H.1
- Overton, John Henry, 1835-19031
- Overton, Robert, 1859-1924.1
- Owen & Moore, Drug Co. (Clarksville, Tenn.)1
- Owens Bros-Hillson Co. (Boston, Mass.)1
- Owne, R.1
- Oxford College of Emory University1
- P. Bloom's.1
- P. D. Cottingham & Co.1
- P. S. Clark & Company (Darien, Ga.)1
- P.C. Sykes (Philadelphia, Pa.)1
- P.R. Papin Photo Co. (St. Louis, Mo.)1