Thanks for the link! I had meant to look these up after watching videos of some Hamming lectures (https://www.youtube.com/playlist?list=PL2FF649D0C4407B30 http

Thanks for the link! I had meant to look these up after watching videos of some Hamming lectures (https://www.youtube.com/playlist?list=PL2FF649D0C4407B30 https://www.youtube.com/playlist?list=PL2FF649D0C4407B30) where he mentions using "gun directors" for various problems.