Sciences, Engineering and Technology
- DTIC (Defense Technical Information Center) - Resources
- Geological Survey, U.S. (USGS) - Data
- GrayLIT Network (Retired website). See: Science.gov
- Journal Sources (Office of Scientific and Technical Information)
- NASA Technical Reports Server (NTRS)/NASA STI Repository
- National Institute of Standards and Technology (NIST)
- National Oceanic and Atmospheric Administration (NOAA) - Resources
- Nuclear Regulatory Commission (NRC)
- National Technical Reports Library (NTRL)- NTIS
- Office of Scientific and Technical Information (OSTI)
- Science.gov
- SciTech Connect (Energy, Engineering, and Science Research Database). Now: OSTI.gov
- Smithsonian – Explore Science
- TRAIL – Technical Report Archive & Image Library