The term OPEC Country refers to a country that is a member of the Organization of the Petroleum Exporting Countries (OPEC). One such country is IRAN, which has four letters. IRAN is a Middle Eastern country located in Western Asia and is the second-largest nation in the region. It is bordered by Iraq, Turkey, Armenia, Azerbaijan, Turkmenistan, Afghanistan, and Pakistan. IRAN is a major oil producer and has the world's fourth-largest proven crude oil reserves. It is also the second-largest exporter of crude oil in the world.