MIT 6.001 Lecture 7A: The Metacircular Evaluator
MIT OpenCourseWare · Lecture · YouTube title: Lecture 7A | MIT 6.001 Structure and Interpretation, 1986
Why it's here
HN commenters cite it as the classic explanation of eval and the meta-circular evaluator.
What it covers
Lecture 7A of the 1986 MIT 6.001 SICP course, with Gerald Sussman presenting the metacircular evaluator, part 1. It shows how a Lisp evaluator can be written in Lisp itself.