RFID reader systems, readers, components, software and methods cause {HEAD ~ RFID tags} to backscatter {TAIL ~ a combination} made from at least portions of a first code and a second code, without transmitting any commands in the interim 
RFID reader systems , readers , components , software and methods cause { HEAD ~ RFID tags } to backscatter { TAIL ~ a combination } made from at least portions of a first code and a second code , without transmitting any commands in the interim
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH