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