Iran which literally means: “the Arian homeland” is a country in southwest of Asia. Iran Comprising a land area of 1,648,195 km2. It is the second-largest country in the Middle East and the 18th-largest in the world. Iran is bordered to the northwest by Armenia and the Republic of Azerbaijan, to the north by the Caspian Sea, to the northeast by Turkmenistan, to the east by Afghanistan and Pakistan, to the south by the Persian Gulf and the Gulf of Oman, and to the west by Turkey and Iraq. Tehran is the capital city which is the leading center of cultural, political and official activities. Having considerable fossil fuel resources (second-largest proved gas reserves and sixth exporter among the Organization of Petroleum Exporting Countries) Iran has gained mediocre and important regional authority in the Middle East.