CIA World Factbook: Country Listing, guide to country profiles, Reference maps etc...
EPA's Science Inventory: A searchable, Agency-wide catalog of more than 4,000 science activities such as research, technical assistance and assessments, along with more than 750 peer-reviewed products.
USA.gov: Government website to provide the public with easy, one-step access to all online U.S. Federal Government resources.
GPO Access: Official Government Information.
FDsys: Federal Digital System. america's authentic government information.
Morbidity and Mortality Weekly Report (MMWR) - is prepared by the Centers for Disease Control and Prevention (CDC). The data in the weekly MMWR are provisional, based on weekly reports to CDC by state health departments. The reporting week concludes at close of business on Friday; compiled data on a national basis are officially released to the public on the succeeding Friday.
National Technical Information Service (NTIS): U.S. Department of Commerce, The Central Source for Government Information.
REGULATIONS.gov: one stop site to comment on Federal Regulations. On this site, you can find, review, and submit comments on Federal documents that are open for comment and published in the Federal Register, the Government's legal newspaper
Science.gov: a gateway to authoritative selected science information provided by U.S. Government agencies, including research and development results.
The White House