FIG 2 illustrates {HEAD ~ a system} 200 using {TAIL ~ a plurality} of devices employing wireless communication using techniques such as reflective backscatter to provide and receive information 
using
FIG 2 illustrates { HEAD ~ a system } 200 using { TAIL ~ a plurality } of devices employing wireless communication using techniques such as reflective backscatter to provide and receive information
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH