It deals in bbls

• Ecuador joined it in 2007
• Intl. fuel cartel
• Gp. founded in Baghdad
• Energy organization that includes Saudi Arabia and Iran: Abbr
• Black gold gp
• Org. affected by increases in U.S. oil production
• Org. founded in Baghdad in 1960
• Fifteen-nation gp

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
initialism (acronym) for Organization of Petroleum-Exporting Countries, founded 1960.