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The NASA Technical Reports Server (NTRS) provides access to technical literature on projects funded or created by NASA, including conference papers, journal articles, meeting papers, patents, research reports, images, movies, and videos. NTRS's basic and advanced searches can be used to search for information from NASA and/or NACA (National Advisory Committee for Aeronautics 1915-1958), as well as images and videos from NIX (the discontinued NASA Image eXchange). The NTRS collects scientific and technical information from NASA's technical report servers and non-NASA sites using the Open Archives Initiative Protocol for Metadata Harvesting (OAI-PMH). Many NASA documents are available in full text.