Satan-2 nuke? Who named that thing? Oh well, better than G-d’s righteous weapon.
[Satan-2? Who named that thing?]
Byeman Control System, most likely
https://en.wikipedia.org/wiki/Byeman_Control_System
IIRC, this is where you get MiG-23 “Flogger” (F - Fighter)
MiG-25 Foxbat
MiG-31 Foxhound
Tu-160 Blackjack (B - Bomber)
Tu-95 Bear
etc.