![]() To efficiently store data, QR codes use four standardized modes of encoding (i) numeric, (ii) alphanumeric, (iii) byte or binary, and (iv) kanji. In practice, QR codes contain data for a locator, an identifier, and a website visitor tracking. A barcode is a machine-readable optical image that contains information specific to the labelled item. QR code for the URL of the English Wikipedia Mobile main pageĪ QR code ( Quick Response code) is a type of two-dimensional matrix barcode, invented in 1994, by Japanese company Denso Wave for labelling automobile parts.
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