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  2. QR code - Wikipedia

    en.wikipedia.org/wiki/QR_Code

    The QR code system was invented in 1994, at the Denso Wave automotive products company, in Japan. [5] [6] [7] The initial alternating-square design presented by the team of researchers, headed by Masahiro Hara, was influenced by the black counters and the white counters played on a Go board; [8] the pattern of position detection was found and determined by applying the least-used ratio (1:1:3 ...

  3. Barcode - Wikipedia

    en.wikipedia.org/wiki/Barcode

    Barcode. A UPC-A barcode. A barcode or bar code is a method of representing data in a visual, machine-readable form. Initially, barcodes represented data by varying the widths, spacings and sizes of parallel lines. These barcodes, now commonly referred to as linear or one-dimensional (1D), can be scanned by special optical scanners, called ...

  4. Barcode reader - Wikipedia

    en.wikipedia.org/wiki/Barcode_reader

    A barcode reader or barcode scanner is an optical scanner that can read printed barcodes and send the data they contain to computer. [ 1] Like a flatbed scanner, it consists of a light source, a lens, and a light sensor for translating optical impulses into electrical signals. Additionally, nearly all barcode readers contain decoder circuitry ...

  5. 10 Receipt Scanner Apps That Reward You for Everyday Shopping

    www.aol.com/finance/best-receipt-scanner-apps...

    1. Fetch Rewards: Best for Free Gift Cards. Fetch Rewards lets you earn a minimum of 25 reward points by scanning digital and print receipts — 35 points minimum for qualifying purchases. It also ...

  6. Costco membership changes coming to Tennessee: What ... - AOL

    www.aol.com/costco-membership-changes-coming...

    This initiative aims to crack down on non-members using member cards to shop at the store. ... all members must scan their physical or digital membership card by placing the barcode or QR Code ...

  7. Costco is cracking down on membership sharing by scanning ...

    www.aol.com/costco-cracking-down-membership...

    Currently, a Costco membership is $60, but as of Sept. 1, "Gold Star" membership in the U.S. and Canada will cost $65 and "Executive Memberships" will increase from $120 to $130, with the ...

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