O'Donell, Dr. Carlos A. (1948–1950, 10 letters) Ojeda, Arthur (1950, 1 letter) Oliver, Roland L. (1954, 3 letters) Olmo, Dr. Harold P. (1950, 3 letters) Olson, Eva (1954, 3 letters) Oregon Bulb Farms (1948, 1 letter) Osburn, Willie (1948, 3 letters) Osmundsen, John (1953–1955, 5 letters) Ossa, Gaston (1950–1953, 6 letters) Oswald, John W. (1955, 1 letter) Padilla, Miguel A. (1952, 6 letters) Page, Philip R. (1951, 2 letters) Pam, Major Albert (1950, 7 letters) Pan American World Airways Systems (1948, 1 letter) Panje, Dr. R.R. (1954, 3 letters) Panunzio, Constantine (1954, 8 letters) Paris, Clark D. (1950, 3 letters) Park, Charles A. (1941, 1 letter) Parodi, Lorenzo R. (1956, 1 letter) Paskevski, Victor (1951, 2 letters) Patterson, M.F. (1950, 1 letter) Payne, Theodore (1953, 2 letters)