Ohya Masato
Oizumi Masaru
Okazaki Kouki
Oldaker Ian E.
Oliva Antonino F.
Olivera Pedro C.
Olynyk Joseph Michael
Onishi Toru
Ono Katsuhiro
Ontario Hydro
Ookawa Masahiro
Oose Seiroku
Orange Christian
Orecchia Luigi
Orion Tech Anstalt
Orr William L.
Orrington E. Dwyer
Orville L. Smith
Osgood J. Whittemore Jr.
Oswald Wolfgang