arXiv is a repository of electronic preprints approved for publication after moderation, that consists of scientific papers in the fields of mathematics, physics, astronomy, computer science, quantitative biology, statistics, and quantitative finance, which can be accessed online. In many fields of mathematics and physics, almost all scientific papers are self-archived on the arXiv repository. Begun on August 14, 1991, arXiv.org passed the half-million article milestone on October 3, 2008, and hit a million by the end of 2014. By October 2016 the submission rate had grown to more than 10,000 per month.
arXiv Physics feeds Index
A hyperlinked index of feeds from respective major classes of Physics archived at arXiv