Compendex
One of the most comprehensive engineering literature databases available to engineers. With 14 million records across 190 engineering disciplines, Compendex delivers the comprehensive, precise information and insights that researchers need.
NTIS
Every year, governments all over the world spend billions of dollars in unclassified research. The National Technical Information Service (NTIS) aggregates these reports, and has approximately 2.5 million unclassified reports from research conducted in 350 subject areas.
Knovel
Knovel is a web-based application integrating technical information with analytical and search tools to drive innovation and deliver answers engineers can trust.