| Name | Affiliation | Country |
|---|
| Oakham, Gerald | Carleton University | CANADA |
| Obraztsov, Vladimir F. | Institute for High Energy Physics | RUSSIAN FEDERATION |
| Odake, Satoru | Shinshu University | JAPAN |
| Oddone, Pier | Lawrence Berkeley National Laboratory | U.S.A. |
| Oehler, Christian | Forschungszentrum Karlsruhe | GERMANY |
| Ogawa, Satoru | Toho University | JAPAN |
| Ogushi, Sachiko | Ochanomizu Women's University | JAPAN |
| Oh, Benedict Y | PENN STATE UNIVERSITY | U.S.A. |
| Oh, Choo-Hiap | National University of Singapore | SINGAPORE |
| Oh, Sun Kun | Konkuk University | KOREA |
| Ohba, Ichiro | Waseda University | JAPAN |
| Ohlsson, Tommy | Royal Institute of Technology | SWEDEN |
| Ohlsson-Malek, Fairouz | CNRS/IN2P3/U.Joseph Fourier-Grenoble | FRANCE |
| Ohshima, Takayoshi | Nagoya University | JAPAN |
| Ohska, Tokio K. | KEK | JAPAN |
| Ohsugi, Takashi | Hiroshima University | JAPAN |
| Ohta, Nobuyoshi | Osaka University | JAPAN |
| Okabe, Hisataka | Osaka Prefectural Education Center | JAPAN |
| Okada, Yasuhiro | KEK | JAPAN |
| Okusawa, Toru | Osaka City University | JAPAN |
| Oldeman, Rolf G.C. | NIKHEF | THE NETHERLANDS |
| Olive, Keith A | University of Minnesota | U.S.A. |
| Olsen, Stephen L. | Hawaii | JAPAN |
| Onogi, Tetsuya | Hiroshima University | JAPAN |
| Oren, Yona | Tel-Aviv University | ISRAEL |
| Orr, Lynne H. | University of Rochester | U.S.A. |
| Orr, Robert S | University of Toronto | CANADA |
| Oshimo, Noriyuki | Ochanomizu Women's University | JAPAN |
| Osland, Per | University of Bergen | NORWAY |
| Ots, Ilmar | University of Tartu | ESTONIA |
| Ould-Saada, Farid | University of Oslo | NORWAY |
| Ozaki, Kazuhiko | Osaka Institute of Technology | JAPAN |