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Tiny trackers

Nano-scale computer chips control tiny tags that can be attached to anything you might buy in a shop. Each one transmits a unique radio-frequency identity (RFID) code that allows storeowners to keep track of the product from the warehouse to the checkout. This helps deter thieves as well as control stock levels.



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Radio-frequency identity tags can help keep track of products from the warehouse to the checkout.
Radio-frequency identity tags can help keep track of products from the warehouse to the checkout.
Image: Alien Technology Ltd

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