O'Banion Thomas A.
O'Handley Robert C.
O'Neil Donald J.
O'Connor Cosen
O'Hair John G.
O'Louhlin James J.
O'Neal Allen
O'Neil Jeffrey C.
O'Rourke Eugene L.
O. Kytola ja Kumpp. Kommandiittiyhtio
Oakes Martin
Oberholtz Glenn S.
Oberle Peter
Ocean Research Equipment, Inc.
Ochi Hideyuki
Ochiai Koichi
Ochiai Kouichi
Ockleston Grant Andrew
Octel S.A.
Oeder Ottmar