O'Dell Anthony
O'Connell John P.
Oberg Russell F.
Odell Chris L.
Ohkawa Aya
Ohnuma Mitsuru
Ohtaka Tadashi
Okamoto Eiichi
Olson Geoffrey
Olympus NDT Inc.
Omuro Makoto
Onuma Seiji
Orenstein Gabriel
Ormand Tommy K.
Orr David K.
Otsuka Shinobu