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Gotta love it when “Category Theory for Programmers” is provided as a further reading link on a very introductory article.

Yes. Although I question the usefulness of this jargon list, I think Bartosz Milewski’s CTfP is excellent:

I bought a physical copy of this recently, it's been great so far, certainly the best introduction to the topic I've read.

Where can I order a physical copy?

Thank you very much for that. Downloaded, on read list now.