Update unix-1992/README.md.

unix-1992/README.md

@@ -11,6 +11,51 @@ them as I received them.
 
 Of note is that there is more documentation here than in my tarball.
 
+## Some More History
+
+In January of 2021, Rob Pike supplied more history. Reprinted here
+by permission.
+
+> From: Rob Pike <robpike AT gmail.com>
+> Date: Sun, 31 Jan 2021 19:29:46 +1100
+> Message-ID: <CAKzdPgxMiFVt5ejZm4-AHKEmqnimpZvqZXKy2afCsvkTOw0NXA@mail.gmail.com>
+> To: Lars Brinkhoff <lars AT nocrew.org>
+> Subject: Re: [TUHS] Qed vs ed
+> Cc: TUHS main list <tuhs AT minnie.tuhs.org>
+>
+> The version of qed Leah refers to is not pure. It was created in the late
+> 1970s by Tom Duff, Hugh Redelmeier, David Tilbrook and myself by hacking
+> the (already hacked) v6 ed we had at the University of Toronto, to restore
+> some of the programmability that had been removed when ed was created, and
+> to have fun. Mostly to have fun.
+>
+> Tom Duff used a real QED (sic) on the GCOS at Waterloo and was a bit
+> conflicted about all this. For me the programmability was fun, and I wrote
+> the tutorial, but what ended up sticking with me was the ability to edit
+> multiple files simultaneously, something no other editor I had available
+> could do. I don't mean switching between files, I mean making things like
+> global substitutions across *.c. I'd start a session by typing qed *.[ch]
+> and go from there.
+>
+> Our qed traveled with me from Caltech to Bell Labs, where I used it to
+> write jim, which I used to write sam, which I used to write Acme. I tried
+> vi when starting jim, but again the one file thing was too much to bear. I
+> also tried emacs, which could in principle handle multiple files but the
+> interface was cumbersome - it was much too hard to open a new file in a
+> subwindow - and without regular expressions I gave up after a day or two.
+> Also with a 2-d screen and a 1-d input device (no mouse), vi and emacs were
+> too remote, like giving directions to someone holding a map without being
+> able to point at the map. Describing where you want to point rather than
+> just pointing.
+>
+> Anyway that was 40 or so years ago, and it's clear from the screens on
+> others' desks at work that my opinion on those matters is not widely shared.
+>
+> I had a lot of fun hacking qed, mostly side-by-side with Tilbrook, who was
+> its biggest fan. He taught me a lot and I loved working with him.
+>
+> -rob
+
 #### Last Updated
 
-Mon Dec 31 18:13:51 IST 2018
+Mon Feb  1 08:22:02 IST 2021