Mechanical Engineering Technology

OSTI.gov provides free access to technical reports, research papers, and data from the U.S. Department of Energy and other federal agencies.

The Trail Technical Report Archive and Image Library is a digital archive of historic U.S. government technical reports, especially in engineering and industrial technology.

The Library of Congress Technical Reports Collection holds one of the largest collections of technical reports in the world, including U.S. government, defense, and industry-sponsored research dating back decades. The collection covers mechanical engineering, materials, energy systems, and industrial technologies.

The National Technical Reports Library (NTRL) is a comprehensive database of U.S. government-funded technical reports across engineering, safety, energy, and industrial processes.

The NASA Technical Reports Server (NTRS) is a collection of NASA's technical documents on engineering, mechanics, lubrication, and materials science. Many reports have direct applications in machinery reliability and failure analysis.