That's a wonderfully interesting article. Steele was one of the authors of the TMACS package, for which this article has “???” in the references. Incidentally

That's a wonderfully interesting article. Steele was one of the authors of the TMACS package, for which this article has “???” in the references. Incidentally, the article mentions Multics' version of QED in passing; this regular-expression-based editor was written by Ken Thompson¹ and is a (more complicated) ancestor of ed(1), the standard text editor on Unix. ¹ http://cm.bell-labs.com/cm/cs/who/dmr/qed.html http://cm.bell-labs.com/cm/cs/who/dmr/qed.html