♤ OPEC is a permanent intergovernmental organization of 14 oil-exporting developing nations that coordinates and unifies the petroleum policies of its Member Countries.

♤ It was established at the Baghdad Conference on September 10–14, 1960

♤ OPEC Secretariat located in Vienna, Austria, it also functions as the Headquarters of the Organization. The Secretariat was originally established in 1961 in Geneva, Switzerland. In April 1965 it was shifted to Vienna.