ATP International Series | International Monetary Fund | Russian Academy of Sciences | Society of Jesus | Royal Society | International Red Cross and Red Crescent Movement | ATP International Series Gold | National Geographic Society | International Space Station | Amnesty International | International Olympic Committee | National Academy of Sciences | American Academy of Arts and Sciences | Adobe Systems | BirdLife International | International Finance Corporation | International Organization for Standardization | International Telecommunication Union | International Criminal Court | American Cancer Society | One Day International | International Nonproprietary Name | International Labour Organization | International Civil Aviation Organization | International Boxing Federation | BAE Systems | Cisco Systems | Toronto International Film Festival | International Atomic Energy Agency | International Maritime Organization |
He has been president of the International Society for the Systems Sciences in 2000, a position previously held by such notable scholars as: Margaret Mead, Ilya Prigogine, Russell Ackoff, Sir Charles Geoffrey Vickers and C. West Churchman.