BHP Billiton Plc engages in the exploration, development, production, processing and marketing of minerals, and oil and gas. It operates through the following segments: Petroleum, Copper, Iron Ore, and Coal. The Petroleum segment focuses on exploration, development and production of oil and gas. The Copper segment includes mining of copper, silver, lead, zinc, molybdenum, uranium, and gold. The Iron Ore segment focuses only on mining of iron ore. The Coal segment is the mining of metallurgical coal and thermal (energy) coal. The company was founded on June 29, 2001 and is headquartered in London, the United Kingdom.