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Radio Frequency IDentification Technology .
RFID uses radio signals to gather data from RFID tags .
The Collected data has a wide variety of uses :
Inventory control
Paying Tolls <-- see you already are using RFID
Tracking - people,tools,food products,materials,animals.
a number of RFID frequencies are used from 13.56 Mhz - 5 ghz
and beyond
the most popular / promising / common frequency is 915 mhz .
this 915 mhz frequency is similar to the frequency used in many
home appliances and doesn't require a license to operate RFID.
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