Chevron Corporation is committed to providing administrative, financial, and technical support for energy and chemical operations. It operates through upstream and downstream segments. The upstream segment includes exploration, development, and production of crude oil and natural gas, liquefaction, transportation, and regasification related to liquefied natural gas, international major oil export pipeline transportation of crude oil, processing, transportation, storage, and sales of natural gas, as well as gas-to-liquid plants. The downstream business includes refining crude oil into petroleum products, selling crude oil and finished products, transporting crude oil and finished products through pipelines, ships, mobile equipment, and rail cars, and manufacturing and selling industrial commodity petrochemical products and plastics, as well as fuel and lubricant additives. The company was founded in 1906 and is headquartered in San Ramon, California.