There’s a whole WORLD that’s _everything_ to librarians but is hardly known outside of their world.
I know about them because I… um… yeah I err.. hacked it a little. I got my name in a handful of their databases with fake books year year during a bored night utilizing ancient protocols that few even know about. I hoped it would spread virally, making me an author showing up in libraries everywhere, but it only seemed to affect a few libraries and then vanished after a week. Meh.
[ps – it’s this protocol: https://en.wikipedia.org/wiki/Z39.50 – it’s Pre-WWW but it communicates over TCP/IP]