So why post the Columbia link with such a different and misleading title? See here: https://news.ycombinator.com/newsguidelines.html

That Wikipedia page is self-contradictory about the script supervisor/continuity role, saying that she invented the it when sound feature films came in and also crediting her with it in movies 10 years before that. This one says she invented it in 1918: https://en.wikipedia.org/wiki/Script_supervisor