Rio Tinto Ltd. is an international mining company that focuses on finding, mining and processing the Earth's mineral resources. Its businesses include open pit and underground mines, mills, refineries and smelters as well as research and service facilities. The company comprises of five principal product groups: Aluminium, Copper, Diamonds & Minerals, Energy and Iron Ore. It also comprises two support groups: Technology & Innovation and Exploration. The Aluminium product group includes bauxite, alumina and aluminium. The Copper group includes copper, gold, molybdenum and silver. The Diamonds & Minerals group comprises mining, refining and marketing operations across four sectors. This group includes diamonds, borates, salt and titanium dioxide. The Energy product group includes thermal coal, used for electricity generation in power stations, and of coking coal for steel making. Its products include thermal coal, coking coal and uranium. The Iron ore product group supplies to the iron ore market which makes steel for industrial and infrastructure use. It is also a salt exporter, producing industrial salt for the chemicals industry. Its products include iron ore and salt. Its projects include Benga, Oyu Tolgoi, Pilbara, and Simandou. The company was founded on December 17, 1959 and is headquartered in Melbourne, Australia.