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2. Wikipedia:WikiProject QRpedia/user guide - Wikipedia

   en.wikipedia.org/wiki/Wikipedia:WikiProject...

   The codes should be well lit. Shadow makes it more difficult to scan. Avoid reflected glare (particularly when laminating the codes or placing them behind glass). Larger codes will scan more effectively. 2 inches (5 cm) across will allow for distance and older smartphones with lower quality cameras. 1 inch (2.5 cm) should be the minimum.

3. 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. [6] [7] [8] 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; [9] the pattern of the position detection markers was determined by finding the least-used sequence of ...

4. File:QR Code Version 25.svg - Wikipedia

   en.wikipedia.org/wiki/File:QR_Code_Version_25.svg

   Version 25 QR Code, up to 1853 characters at L level. A QR code (abbreviated from Quick Response code) is a type of matrix barcode (or two-dimensional code) that is designed to be read by smartphones. The code consists of black modules arranged in a square pattern on a white background. The information encoded may be text, a URL, or other data.

5. 50 Incredibly Cool Things That Are Free Online That Everyone ...

   www.aol.com/lifestyle/52-helpful-things-free...

   Image credits: Fernandov2 #8. I built [qrfa.st](https://qrfa.st) which offers free qr codes. I built it because I heard horror stories about people making qr codes, only to find out later they had ...

6. Barcode Scanner (application) - Wikipedia

   en.wikipedia.org/wiki/Barcode_Scanner_(application)

   QR codes are often embedded in websites; Barcode Scanner can open a browser at the encoded site, for example, facilitating the download of an application. As of May 2016 [update] , this is one of the most downloaded Android applications as listed by Google Play , with over 600,000 ratings and over 126 million user installs.

7. Oklahoma revokes license of teacher who gave class QR code to ...

   www.aol.com/news/oklahoma-revokes-license...

   Oklahoma's education board has revoked the license of a former teacher who drew national attention during surging book-ban efforts across the U.S. in 2022 when she covered part of her classroom ...