ATP International Series | World Health Organization | International Monetary Fund | Physics | Harvard Medical School | International Red Cross and Red Crescent Movement | ATP International Series Gold | International Space Station | Amnesty International | International Olympic Committee | physics | BirdLife International | International Finance Corporation | International Organization for Standardization | World Trade Organization | International Telecommunication Union | International Criminal Court | World Intellectual Property Organization | One Day International | International Nonproprietary Name | International Labour Organization | Food and Agriculture Organization | Charitable organization | International Civil Aviation Organization | International Boxing Federation | Toronto International Film Festival | International Atomic Energy Agency | World Meteorological Organization | United Nations Industrial Development Organization | International Maritime Organization |
Since then the initiative has been supported by many international organisations, including the American Association of Physicists in Medicine (AAPM), International Organization for Medical Physics (IOMP), International Atomic Energy Agency (IAEA), World Health Organization (WHO), and International Center for Theoretical Physics (ICTP).