O'Callaghan William
Ogawa Akihiro
Ohira Yukiko
Okomori Koji
Olson Christopher C.
Omura Tomonobu
Otsuka Chemical Co. Ltd.
Owen David Malcolm
Ozaki Tomoaki
P. T. Chemicals, Limited
Pahl Timo
Pakarinen Juha
Park David W
Parker Steven Herman
Penntech Papers, Inc.
Petermann Peter
Philip Chem-Solv, Inc.
Pietikäinen Reijo
Pitkänen Maija
Plonka John