In my experience useful scientific knowledge is accumulated in people actively working. Documents (books, papers, guides, programs, talks, blog posts, etc) are

In my experience useful scientific knowledge is accumulated in people actively working. Documents (books, papers, guides, programs, talks, blog posts, etc) are communication tools, but are limited by the medium and the ability of the authors. People can consume documents and create analogies to their specific work, but from there it's the process of working that produces: experts, systems, tools. Sometimes those products are again documented.