[throwaway81523]

Chapter 8 sample pdf has a typo(?) in the first paragraph. Carl Hewitt's last name is spelled both Hewitt and "Hewitz", maybe even in the same sentence.

Using an accumulation parameter with tail recursion was per Wikipedia introduced in one of the LTU papers, sometime before Scheme. So the description in the chapter is at best imprecise. But, I would want to look further back historically to see whether any Algol compilers used the technique.

Overall the book looks readable as an intro to Lisp and Lisp implementation, but in a history book I'd like to see more precision and depth, careful citations, etc.

[cdegroot]

Darn, I had his name wrong and fixed it, but somewhere an undo button must have been hit. Thanks for pointing it out.

I'm more than happy to add corrections to an already "longer than zero" list of errata. I'll give the Scheme chapter and Wikipedia a once-over to see where I went off the rails.

[throwaway81523]

There's also an issue where Hewitt's actors were more like Erlang processes, i.e. unlike Scheme closures, they could run independently of each other. Maybe call/cc can simulate something like that. I remember the footnote in SICP claiming that Scheme was developed partly to understand what Hewitt was talking about, but I think that might not have been serious. It could be worth trying to talk to Steele or Sussman about this history.