经济合作与发展组织(经合组织)    organization for Economic Cooperation and Development (OECD)

欧洲经济合作组织    Organization for European Economic Cooperation (OEEC)

欧洲安全与合作组织(欧安组织，原欧洲安全与合作会议)    Organization for Security and Cooperation in Europe (OSCE, formerly known as Conference on Security and Cooperation in Europe)

拉丁美洲和加勒比禁止核武器组织    Organization for the Prohibition of Nuclear Weapons in Latin America and the Caribbean

非洲统一组织(非统组织)    Organization of African Unity (OAU)

美洲国际组织    Organization of American States (OAS)

阿拉伯石油输出国组织    Organization of Arab Petroleum Exporting Countries (OAPEC)

亚洲-太平洋通讯社组织    Organization of Asia-Pacific News Agencies (OANA)

中美洲国家组织    Organization of Central American States

石油输出国组织(欧佩克)    Organization of Petroleum Exporting Countries (OPEC)

亚非拉人民团结组织    Organization of Solidarity of the Peoples of Africa, Asia and Latin America (OSPAALA)

东加勒比组织    Organization of the Eastern Caribbean States

伊斯兰会议组织    Organization of the Islamic Conference (OIC)

泛非妇女组织    Organization Panafricaine des Femmes (OPF); Pan-African Women’s Organization (PAWO)