a distributed digital communication system within each of said slave and master subsystems, {HEAD ~ each} including {TAIL ~ a supervisor processor}, 
a distributed digital communication system within each of said slave and master subsystems , { HEAD ~ each } including { TAIL ~ a supervisor processor } ,
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH