searching the author(s) of ETAION SHRDLU, a chess program which participiated at ACM 1975 and ACM 1976 computer chess events,
see ACM COMPUTER CHESS by Bill Wall.
The Computer History Museum Photo, a Gift of Monroe Newborn:

from The Computer History Museum states Newborn and Courtois at the 6th ACM North American Computer Chess Championship in Minneapolis, Minnesota, 1975.
I found Pierre-Jacques Courtois from Belgium with Google, which might be the right one, but found nothing relevant on his pages according to the ACM chess events.
Ok, I may try to mail Pierre-Jacques Courtois or Newborn. Maybe some of you (e.g. Bob, Carey) know more about this program and their author(s)?
This one has obviously some wrong text associated:

from here. Bob, who is the guy far left? (not Levy, I guess!)
Thanks,
Gerd