O'Brien Clarence
O'Connell Bonnie
O'Connell Walter
O'Connor Cary E.
O'Leary John
O'Rourke Jessie
O'Sullivan Donald M.
O-Motus, Inc.
Oberg Ake Per
Ochirov Nikolai I.
Ochs David J.
Oda Jun
Oden Robert R.
Odne L. John
Oebser Alfred L.
Office de Distribution D'Appareils Medicaux
Ofmec Officine Meccaniche Mantovane S.p.A.
Og Ogiken Co., Ltd.
Ogami Noboru
Oganesian Oganes V.