Oleinik Nikolai P.
Ollila Harry
Olsen Ib
Omni Materials, Inc.
Ono Hidetaka
Onogawa Hiroyuki
Oogiri Tetuo
Ooguri Masaharu
Oota Hideaki
Oowada Teruo
Organic Power ASA
Orgatechna Treuhand AG
Orita Norihiko
Orjala Markku
Ormat Inc.
Ort Gene P.
Osborn Liman D.
Oshima Taku
Oshita Takahiro
Osmo Kaulamo Engineering Oy