The NASA Technical Reports Server provides access to NASA's current and historical technical literature. NTRS searches three major collections: NACA (1915-1958), NASA (1958-present), and NASA Image eXchange (NIX) (1900-present). Search results include: conference papers, images, journal articles, photos, meeting papers, movies, patents, research reports, and technical videos.
The United States Department of Commerce National Technical Information Service (NTIS) serves as the largest central resource for government-funded scientific, technical, engineering, and business related information available today. Included are citations for millions of publications in hundreds of subject areas.