TECHNICAL SEARCH ENGINES
More than 32,000 circuit diagrams and schematics.
This page lets you choose among more than 250 million electronic parts.
wide array of scholarly literature, including journals, books, theses, and more from professional societies, universities, academic publishers, etc.
THE NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY
links to a wide variety of science and engineering sites for searching everything from military specifications to specific standards bodies from around the globe.
PATENT LAW SEARCH
This website has a wide array of search engines that will allow you to review existing patents as part of your due diligence.
academic results from more than 1 billion indexed documents, web pages, books, journals, newspapers, and more.
Use it to seek out journal articles, technical books, researcher homepages, patents, and more.
Math computation search engine