O'Connor David
O'Connor Lawrence T.
O'Dwyer Thomas L.
Obenchain Richard F.
Onahama Smelting and Refining Co., Ltd.
Osaka Hiromi
Osaka Fuji Corporation
Ostergaard Mack R.
Otsuka Hajime
Outokumpa Oyj
Outokumpu Research Oy
Outotec Oyi
Overländer Jörg