I see more and more posts on HN that rely on ArXiv for scientific articles. While many researchers in CS publish their research on preprint servers, these are (a) only one part of the scientific publications out there and (b) articles often not (yet) peer reviewed.<p>I get that ArXiv is a convenient way to download scientific papers, especially without access to universities or libraries' access, but one should always be careful with non-peer reviewed research.