Names
- Osthus, Carl1
- Oswald, Lee Harvey1
- Ottison, Skyler1
- Owen, Kent1
- Oxford University1
- Parker, Keith1
- Parmenter, Charlie1
- Patterson, Robert P.1
- Pawner, Nelson1
- Payne, Fernandus1
- Peace Corps1
- Perguson, Dee1
- Peterson, John1
- Pfohl, Russell1
- Phi Beta Kappa1
- Phi Betta Kappa1
- Phi Gamma Delta1
- Phi Kappa Psi1
- Pinnell, George1
- Pittsburgh Symphony Orchestra1