BHP Billiton Ltd. engages in the exploration, development, production, and processing of iron ore, metallurgical coal, and copper. It operates through the following segments: Petroleum, Copper, Iron Ore, and Coal. The Petroleum segment explores, develops, and produces oil and gas. The Copper segment refers to the mining of copper, silver, lead, zinc, molybdenum, uranium, and gold. The Iron Ore segment mines iron ore. The Coal segment consists of metallurgical coal and energy coal. The company was founded on August 13, 1885 and is headquartered in Melbourne, Australia.