Office of Science and Technology Information (OSTI) - Disseminates scientific and technical information from department research and development, and environmental programs. Search key collections, review project summaries, or view informational videos. Based in Oak Ridge, Tennessee. U.S. Department of Energy - DOE's home page is organized by topic, including Data and Prices, Efficiency, Environmental Quality, National Security, Science and Technology, and Sources and Production. Office of Policy and International Affairs - Information on energy policy development and implementation, international science and technology, libraries, and agreements. Energy Sciences Network (ESnet) - A high-speed network serving thousands of Department of Energy scientists and collaborators worldwide. Department of Energy National Telephone Directory - Organization charts and searchable personnel locator for DOE employees and contractor staff around the country. Office of Environmental Management (EM) - Responsible for U.S. DOE environmental restoration, waste management, technology development, and facility transition and management.