I'd definitely consider SICP a great classical comp sci text... not quite sure why it's not on that list.

SICP is a great book to learn some neat programming from, but it wasn't really a classic text in the same sense as the rest of the list, which is mostly original work or something close to it.

Personally, I think surveys of a field like Russel/Norvig's AI textbook, SICP, or CLRS are more worthwhile to spend time reading compared to original literature.

Perhaps the author thought it was subsumed by the MIT or PLT Online collections mentioned in the introduction? It's in both of those, but I'd agree that it deserves special mention.

Random observation: It's only extra-geeky links like these that lead to pages with a set of links:

RECURSIVE FUNCTIONS OF SYMBOLIC EXPRESSIONS AND THEIR COMPUTATION BY MACHINE (Part I)

This paper appeared in Communications of the ACM in April 1960. It is the original paper on Lisp.

There are html, dvi, pdf and Postscript versions of the paper.

...

Umm, yeah. I think I'll choose "html". Thanks for giving me the option, though.