Okvist Alf
Oldenburg Frederick W.
Oldzewski Robert P.
Olsen Lawrence C.
Olsen Lawrence Calvin
Olsen Peter Martin
Omori Toshiyuki
Ondrias Louis A.
Onomura Masashi
Oppenheimer Greig
Orihashi Akira
Oros Company
Orum & Rotet
Orzechowski John F.
Osborn Engineering, Inc.
Osborne Lee-Ransome
Oswaldsson Rolf
Otness Leslie
Owen David Llewellen
Ozmerih Levent