The premium archive accounts do full-text search of PDFs! If you bookmark lots of papers, this is incredibly useful.<p>I have Pinboard set up as a search engine shortcut in my browser, so I type &quot;pin isogeny&quot; in my URL bar, I get a list of papers about curve isogenies. It&#x27;s pretty great.<p>There are probably just a couple features Pinboard would need to be a pretty useful collaborative research tool.