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Math and Physical Sciences
Science.gov is a government portal that searches over 60 data bases and 2,200 scientific websites.
Defense Technical Information Center (DTIC)
Unclassified reports and scholarly articles are available at this website.
National Aeronautics and Space Administration (NASA)
This website provides the latest news, images and videos pertaining to NASA activities. NASA’s Scientific and Technical Information site is https://www.sti.nasa.gov/ This website includes a Technical Reports server Also, found at this site are over a million bibliographic records and full-text reports.
National Institute of Standards and Technology (NIST)
A physical sciences laboratory, and is a non-regulatory agency of the US Department of Commerce. https://www.nist.gov/
Besides including information on standards and measurements the site also includes information data Examples of data include physical reference data.