arXiv is an open access database of over 1,757,455 scholarly articles in the fields of physics, mathematics, computer science, quantitative biology, quantitative finance, statistics, electrical engineering and systems science, and economics. Materials on this site are not peer-reviewed by arXiv. Check out the math specific section to see what areas this resource covers.
Articles on engineering from journals and conferences published by the IEEE.
Provides access to almost a third of the world's current electrical engineering, telecommunications, power, and computer science literature. Full-text access to all IEEE journals, transactions, magazines, conference proceedings, and all current IEEE standards.