U.S. Department of Energy (DOE) -  .

DOE: Energy Information Administration (EIA) - - Section of the U.S. Department of Energy (DOE) providing statistics, data, analysis on resources, supply, production, consumption for all energy sources.

DOE: Energy Science and Technology Virtual Library - - Collections of scientific and technical information from the U.S. Department of Energy (DOE) with a distributed searching capability.

DOE: Office of Science and Technology Information (OSTI) - - Access to a collection of scientific and technical information from U.S. Department of Energy (DOE).

International Energy Annual (IEA) - - Data summary for world energy production, consumption, price and carbon dioxide emissions.

Wikipedia: Energy - - Free encyclopedia article explaining the scientific notion of energy. Includes units of measure, energy transformation concepts, types of energy, history and uses.