- American Elements Fuel Cell Information Center Detailed information on fuel cells and ultra high purity metals
- API - American Petroleum Institute Trade association representing the U.S. petroleum industry.
- APPEA - Australian Petroleum Production and Exploration Association Representative of the oil and gas exploration and production industry in Australia.
- BP International energy company, providing fuel for transportation, energy for heat and light, retail services and petrochemicals products for everyday items.
- CAPP - Canadian Association of Petroleum Producers Represents companies who explore, develop and produce natural gas, crude oil, oil sands and elemental sulphur in Canada.
- Castrol Supplier of motor oil and specialty lubricants for cars, motorcycles, trucks, boats and aircraft.
- Chevron Refiners and marketers of petroleum products in the United States.
- Elf International refiner and marketer of oil, gas and chemical products.
- Energy Institute International professional body for the energy industries.
- ExxonMobil L&PS Co. International refiner and marketer of a broad range of petroleum products.
- IBP - Brazilian Petroleum Institute Private, non-profit organisation that promotes the development of the Brazilian petroleum industry.
- Indian Oil Corporation Ltd. Refiners and marketers of petroleum products in India.
- IPA - Indonesian Petroleum Association Industry association that represents energy companies in Indonesia.
- Motorex Independent Swiss crude oil refinery active in research, development, and production of innovative lubricants and chemicals.
- NCP - National Chemical and Petroleum Industries, Kuwait Manufacturer of specialty chemical products for the oilfield and petroleum industries.
- SAPIA - South African Petroleum Industry Association Represents the petroleum industry in South Africa.
- Shell Global group of energy and petrochemical companies.
- SPE - Society of Petroleum Engineers International trade association whose members worldwide are engaged in energy resources development and production.
- World Petroleum Council International association dedicated to the application of scientific advances in the oil and gas industries.