12 naftat eksportivat arenguriiki ühendav alaline valitsustevaheline organisatsioon, mis koordineerib ja ühtlustab oma liikmesriikide nafta-poliitikat, international body created in 1961 by countries that produce and export petroleum, for the purpose of establishing common strategies designed to protect member interests by means of production quotas and minimum prices based on quality, permanent intergovernmental organisation of 12 oil-exporting developing nations that coordinates and unifies the petroleum policies of its member countries