How-To Geek

QR Codes

QR Codes, or Quick Response Codes, are a trademarked (but widely used) type of matrix barcode. Instead of encoding the data in a series of vertical stripes (as the data is encoded in a traditional UPC barcode) the QR code data is encoded in a grid that looks like a plot of pixels.

Although the typical consumer encounters QR codes as part of advertisement and on product packaging, the QR code is most heavily used in commercial and industrial settings where the ease of reading and error-correction capabilities of modern scanners made the QR code more dependable than older UPC-style barcodes.

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