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    This is a super interesting article. I remember hearing about PUP - possibly in the supdup manpage when I was on a LISP machine retro-arcana collecting bingge :)

    Also interesting to me that BCPL was in such wide use - I guess I’d always thought it was more of a fringe language than that. The only other instance I’ve ever seen BCPL used in was the early AmigaDOS work by MetaComCo.