EnergyFiles  has been revamped and now searches over 50 databases of science information in fields relevant to the U.S. Department of Energy (DOE). Topics include biology and medicine, fission and nuclear technologies, geophysics, materials science, mathematics, renewable energy, and more. You can search EnergyFiles with a single query at the homepage, or utilize the advanced search for more customized results. You can also browse useful links related to each subject, including links to relevant organizations, conference information, and reference materials. Over 25% of the resources point to DOE-funded research information. EnergyFiles was the first known federal government federated search engine and was listed in 2005 as a top search portal by the Association of College and Research Libraries.