Not UNIX, but adjacent...
With the permission of John Chambers, I'm sharing a scan of "S - A Language
and System for Data Analysis" by Richard Becker and John Chambers, January
1981.
Enjoy:
https://drive.google.com/drive/folders/14ijVPw1DihydXFqTzj-wgl3C5LYEJdKX?us…
I was pleased to learn that the first port of S to UNIX was on the
Interdata 8/32, which I had my part in enabling.