O'Connell Philip J.
O.T.H. Beier & Company (Proprietary) Limited
Oakley, Jr. Roy C.
Obata Yukio
Officina Meccanica Biancalani & C. di Biancalani Fiorenzo & C.S.
Ogasahara Hitoshi
Ogata Kiichi
Oh Dong Yeop
Oh Je Jun
Ohe Hirokazu
Ohshima Ichiro
Oida Susumu
Ollis James R.
Onomori Iron Works Co., Ltd.
OPI Cryochimie
Oropeza Vicente