Names
- North Campus (University of Michigan)1
- North Central Association of Colleges and Schools (U.S.)1
- Nu, U.1
- Oglesby, Beth.1
- Oglesby, Carl, 1935-2011.1
- Ohio State University.1
- Ormandy, Eugene, 1899-1985.1
- Osborn, Chase S. (Chase Salmon), 1860-1
- Osborn, Stellanova, 1894-1988.1
- Oswald, Marina, 1941-1
- Owen, Norman G., collector1
- Pere Marquette Railroad.1
- Piercy, Marge.1
- Pierpoint, Wilbur K., 1914-1
- Plamondon, Genie.1
- Poindexter, Miles, 1868-1946.1
- Potter, Paul, 1939-1
- Potts, Randy.1
- Power, Eugene B., 1905-1
- Procter, William Cooper, 1862-1934.1