The Economic Cooperation Organization (ECO) is an intergovernmental international organization involving ten Asian nations. It provides a platform to discuss ways to improve development and promote trade, and investment opportunities. The nations involved are Afghanistan, Azerbaijan, Iran, Kazakhstan, Kyrgyzstan, Pakistan, Tajikistan, Turkey, Turkmenistan and Uzbekistan. ECO is headquartered in Tehran, Iran. The common objective is to establish a single market for goods and services, much like the European Economic Union.