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Radio-frequency identification (RFID) is a technology that uses radio waves to automatically identify people and things through a chip or tag embedded in an object. Unlike QR and barcodes that must be touched or scanned, RFID tags don’t even need to be within sight of a scanner or reader in order to communicate their identity and other information. RFID chips can be embedded in wearable devices such as RFID badges or wristbands, and uses for access control, cashless payment, data collection, social interaction, and more.