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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. QR reader boarding pass: How does it work? - Air Travel Forum

   www.tripadvisor.com/ShowTopic-g1-i10702-k4887012...

   You complete OLCI as normal and then select send the boarding pass to a phone option. You then open it and it shows a QR code which is held to the scanners at the airport. Many airlines have specific apps which are geared up to issuing QR boarding passes. Pretty efficient system IMO.

4. 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 ...

5. 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 ...

6. Turning a US Covid Vax paper record into a QR code - Cairo ...

   www.tripadvisor.com/ShowTopic-g294201-i9404-k...

   Then I found a (free) online QR Code Generator software to create a QR code linked to the PDF document and added it to my printed copy of the PDF document. So the QR code is basically the same as my printed document, but with some additional information that I added --- address of Walgreens location where I obtained my vaccine.

7. barcode on boarding pass - Air Travel Forum - Tripadvisor

   www.tripadvisor.com/ShowTopic-g1-i10702-k...

   126 reviews. 82 helpful votes. 2. Re: barcode on boarding pass. 5 years ago. There’s different barcode fonts. The barcodes on boarding passes are 2D whereas the ones in stores for example are 1D. Most likely whatever app you’re using is not set up to read the airline boarding pass. Report inappropriate content.