O'brien Peter James
Ohhata Takahiko
Olson Jack
Omori Machinery Co. Ltd.
Open Data S.r.l.
Orhan Jean Mark Yve
Orlandi Ireneo
Orthen Erhard
Osswald Thomas
Ottersen William A.
Otto P. Kalmbach
Overholt Robert S.
Ovrick Richard L.
Canada
World
United States