What is UNIX, Anyway?

Marc Rochkind presented the first FRUUG meeting with the word "UNIX" in the title in five years, and it was a back-to-the-basics talk discussing the UNIX API, what's happened to it over the last few decades, and why (including multiple conspiracy theories). Marc was kind enough to hand out a crib sheet listing all of the relevant URLs mentioned in his slides, and they are:

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