Saui Aramco, the state-owned national oil company of Saudi Arabia, is the largest oil corporation in the world and the world's largest in terms of proven crude oil reserves and production . Headquartered in Dhahran, Saudi Arabia, Saudi Aramco also operates the world's largest single hydrocarbon network, the Master Gas System. It was formerly known as just Aramco between the years of 1933-1988, an acronym for Arabian American Oil Company.