Oh man thanks for posting this. After seeing a few APL references in comments today, it reminded me to go look for this exact book by Ken Iversen. Lo and behold

Oh man thanks for posting this. After seeing a few APL references in comments today, it reminded me to go look for this exact book by Ken Iversen. Lo and behold, I just sit down to peruse HN.... And this link is right above the fold. Sweet.