Citations and select full text of aerospace-related scientific and technical information (STI) created or funded by NASA (1958 to date, and its predecessor NACA (1900-1958)
Department of Defense's central resource for citations and/or full text technical reports, dating primarily from the mid-1900s to the present, about military and other defense-related topics.
Primary search tool for science, technology, and engineering research and development (R&D) results from the Department of Energy and predecessor agencies.
