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2. QR code - Wikipedia

   en.wikipedia.org/wiki/QR_code

   A QR code for the URL of the English Wikipedia Mobile main page. A QR code (quick-response code) is a type of two-dimensional matrix barcode, invented in 1994, by Japanese company Denso Wave for labelling automobile parts.

3. Percent-encoding - Wikipedia

   en.wikipedia.org/wiki/Percent-encoding

   Percent-encoding. URL encoding, officially known as percent-encoding, is a method to encode arbitrary data in a uniform resource identifier (URI) using only the US-ASCII characters legal within a URI. Although it is known as URL encoding, it is also used more generally within the main Uniform Resource Identifier (URI) set, which includes both ...

4. Barcode - Wikipedia

   en.wikipedia.org/wiki/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 barcode ...

5. QR Codes 101 - ed

   files.eric.ed.gov/fulltext/EJ982842.pdf

   What Is a QR Code? A QR code is a two-dimensional scannable code, similar in function to a traditional bar code that you might find on a product at the su-permarket. The main difference be-tween the two is that, while a tradi-tional bar code can hold a maximum of only 20 digits, a QR code can hold up to 7,089 characters, so it can con-

6. QR CODES IN EDUCATION AND COMMUNICATION

   files.eric.ed.gov/fulltext/EJ1097236.pdf

   QR CODES QR Codes consist of black modules arranged in a square pattern on a white background. They are designed to decode the data quickly. It is quite easy to create and use these codes (Pons, 2011). Using QR Codes for education is another way of using the Internet. Quick Response (QR) codes are versatile.

7. Wikipedia:WikiProject QRpedia/user guide - Wikipedia

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

   Paste the URL into the box. (The code will automatically generate.) Edit. Click on the QR code image and save it. Import the QR code image into a word processor programme or graphics package. (Optionally) Add text labels. Print. Print the code a minimum of 1 inch (2.5 cm) across, where possible 2 inches (5 cm).