Barcode
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A barcode or bar code is a method of representing data in a visual, machine-readable symbolic form. Initially, barcodes represented data by varying the widths, spacings and sizes of parallel lines. Th
Barcoded rolling stock in the UK, 1962
Snack vendor on the Shinkansen train scans a barcode.
Barcoded parcel
GTIN barcodes on Coca-Cola bottles. The images at right show how the laser of barcode readers "see" the images behind a red filter.
QR code
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A QR code, short for quick-response code, is a type of two-dimensional matrix barcode invented in 1994 by Masahiro Hara of the Japanese company Denso Wave for labelling automobile parts. It features w
Barcode
…Troy, Ohio used a scanner made by Photographic Sciences Corporation to scan the Universal Product Code (UPC) barcode on a pack of Wrigley's chewing gum. QR codes, a specific type of 2D barcode, rose in popularity in the second decade of the 2000s due to the growth in smartphone ownership. Other systems have made…
QR codes can be displayed on buildings, such as this one being painted in Cape Town.
A QR code printed on the packaging of a cola can, linking directly to the Pepsi website, so the user is not required to manually enter the web address
QR codes may appear in very public places such as this large billboard in Japan; this one links to the sagasou.mobi website.
QR codes have been used and printed on train tickets in China since 2010.