I see

True, it's used for website design and user interface design
I find it hard to believe. Is there a way to verify that information? I don't think anyone besides IT professionals actually deals with those.
Regular expressions are a small topic and indeed useful in different data mangement systems and their search engines. I also heard about SQL being used by accountants and office workers. Python - I'm not sure if it'e used by office workers such as librarians and accountants, but it's used by non-programmers, e.g. mathematicians, physicists to run mathematical simulations and make graphs. Matlab is used too in a similar fashion.
Either way, it would be best to verify the information, what kind of systems are used in libraries, what they are actually like.