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Eyoyo Bluetooth QR Code Scanner, 2D Wireless Back Clip Phone UPC USB Barcode Scanner Reader with Battery Level Indicator Compatible with 4.7"-7.2" Android Phone, iPhone for Book Library Inventory,2D barcode scanner
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How a Hidden Bar Code in iPhone Screens Saved Apple Hundreds of Millions of Dollars — The Information
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13 QR Code Scanners That Won't Send You to Malicious Webpages on Your iPhone « iOS & iPhone :: Gadget Hacks
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