Nelson H. F. Beebe wrote:
kcc was written by Ken Harrenstien from scratch
Rewritten maybe? Some KCC source code files have the comment
"Original version (c) 1981 K. Chen"
which I take to mean referencing Kok Chen.
P.S. I'll be happy to entertain further questions
about these two C
compilers on the PDP-10, offline if you prefer, or on this list.
You never heard about one by Alan Snyder?