On Mon, 14 May 2018, Doug McIlroy wrote:
Here's part of the story.
[...]
You mentioned "nroff" a few times; would it not have been "troff" for
their C/A/T photo-typesetter? At least, that was the lore that I heard...
And what was "C/A/T" anyway (assuming that my memory is not failing me)?
-- Dave