Holding company whose subsidiaries provide retail distribution and the provision of services relating to, fuel oil, propane gas and natural gas. (Nasdaq: ABLE).

Exploration, production, refining, and retail sales. In 2001 operated 1115 net wells in US, Gabon, Indonesia, North Sea and Thailand.

Owns and manages 950 wells in south and central Texas. Assistance in buying and selling leases and water rights in that area. Sells/leases a variety of field equipment including trucks, pump jacks, casing, and drilling rigs.

Integrated natural gas company, including exploration, production, storage, transportation and distribution.

Develops and operates oil and gas properties, transport processes, and storage for imported crude oil and refined products. (Nasdaq: BDCO).

Supplier of petroleum, solar energy, petrochemicals, bitumen, LPG, lubricants, aviation fuels and fuel cards. Information on products, services, environment and society, plus press, careers and investor sections.

Republic of South Africa holding company. Operates producing facilities and gas-to-liquids plant. Retail sales. Awards exploration concessions. Stores crude oil.

Produces and refines oil. Includes product information, community programs and learning center.

Tulsa based global energy company.

Exploration and development in Thailand and Nevada.

Third largest integrated energy company in the U.S. and the fifth largest refiner in the world.

Provides a portfolio of energy-related products and services associated with wholesale natural gas and power marketing and trading.

Operations from wellhead to the trading floor. Oil and gas production, and pipelines.

Petroleum manufacturer. Includes news and product and service information. [NYSE: XOM]

Western Canada oil and gas production. Heavy Oil production. Exploration offshore, eastern Canada. Also operates pipelines, refineries and retail stores.