What microchip-based technology allows tap-to-pay credit cards and pet microchips to transmit data wirelessly?
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Radio-frequency identification (RFID) uses electromagnetic fields to identify and track tags. Tap-to-pay cards use Near Field Communication (NFC), a fine-tuned subset of RFID. Passive tags don't need a battery; they are powered wirelessly by the reader's electromagnetic field. Photo: Nicolas Eynaud, Wikimedia Commons, CC BY 4.0.
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Source: Wikipedia (CC BY-SA)
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