BHP Billiton Limited, together with its subsidiaries, operates as a diversified natural resources company. The company operates 10 customer sector groups (CSGs), aligned with the commodities that the company extracts and markets, which includes Aluminium, Base Metals, Uranium, Diamonds and Specialty Products, Energy Coal, Iron Ore, Manganese, Metallurgical Coal, Petroleum, and Stainless Steel Materials. The Aluminium CSG mines bauxite, refines bauxite into alumina, and smelts alumina into aluminium metal with operations located in Australia, Brazil, Mozambique, South Africa, and Suriname. The Base Metals CSG mines copper, silver, lead, zinc, molybdenum, and gold in Australia, Chile, Peru, and the U.S. The Uranium CSG engages in the production and marketing of uranium and the operation and development of the Olympic Dam ore body. The Diamonds and Specialty Products CSG mines diamonds and titanium minerals in Canada and South Africa. The Energy Coal CSG engages in the mining and marketing of export thermal (energy) coal in Australia, Colombia, South Africa, and the U.S. The Iron Ore CSG engages in the mining of iron ore from various mines located in the Pilbara region of north Western Australia and in Brazil. The Manganese CSG’s principal activities are the mining of manganese ore and production of manganese metal and alloys in Australia and South Africa. The Metallurgical Coal CSG engages in the mining of metallurgical coal in Australia. The Petroleum CSG’s principal activities are oil and gas exploration, production, development, and marketing in Australia, the United Kingdom, the U.S., Algeria, Trinidad and Tobago, and Pakistan. The Stainless Steel Materials CSG produces nickel concentrate primarily for the stainless steel industry and operates various mines, concentrators, smelters, and refineries in Australia and Colombia. The company was founded in 1860 and is headquartered in Melbourne, Australia.