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  2. QR code - Wikipedia

    en.wikipedia.org/wiki/QR_code

    They can generate and print their own QR codes for others to scan and use by visiting one of several pay or free QR code-generating sites or apps. Google had an API, now deprecated, to generate QR codes, and apps for scanning QR codes can be found on nearly all smartphone devices.

  3. Wikipedia:WikiProject QRpedia/user guide - Wikipedia

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

    There is no QRpedia API, but you can use, say, the Google QR code API (other QR code APIs exist) to generate a code with the relevant qrwp.org short URL. for example: http://en.qrwp.org/Amsterdam. or: http://sv.qrwp.org/Vincent_van_Gogh. Note the use of underscores in the latter; and that you can use any two-letter language code ("en, "sv", etc ...

  4. QRpedia - Wikipedia

    en.wikipedia.org/wiki/QRpedia

    QRpedia is a mobile Web-based system which uses QR codes to deliver Wikipedia articles to users, in their preferred language. A typical use is on museum labels, linking to Wikipedia articles about the exhibited object.

  5. Add or disable 2-step verification for extra security - AOL Help

    help.aol.com/articles/2-step-verification...

    Add an extra security step to sign into your account with 2-step verification. Find out how to turn on 2-step verification and receive a verification code, and how to turn off 2-step verification...

  6. Rectangular Micro QR Code - Wikipedia

    en.wikipedia.org/wiki/Rectangular_Micro_QR_Code

    Rectangular Micro QR Code (also known as rMQR Code) is two-dimensional (2D) matrix barcode invented and standardized in 2022 by Denso Wave as ISO/IEC 23941. [2] rMQR Code is designed as a rectangular variation of QR code and has the same parameters and applications as original QR code.

  7. Barcode library - Wikipedia

    en.wikipedia.org/wiki/Barcode_library

    Barcode library or Barcode SDK is a software library that can be used to add barcode features to desktop, web, mobile or embedded applications. Barcode library presents sets of subroutines or objects which allow to create barcode images and put them on surfaces or recognize machine-encoded text / data from scanned or captured by camera images with embedded barcodes.

  8. MeCard (QR code) - Wikipedia

    en.wikipedia.org/wiki/MeCard_(QR_code)

    MeCard is a data file similar to vCard but used by NTT DoCoMo in Japan in QR code format for use with Cellular Phones. It is largely compatible with most QR-readers for smartphones. It is an easy way to share a contact with the most used fields.

  9. Google Authenticator - Wikipedia

    en.wikipedia.org/wiki/Google_Authenticator

    The Google Authenticator app for Android was originally open source, but later became proprietary. Google made earlier source for their Authenticator app available on its GitHub repository; the associated development page stated: "This open source project allows you to download the code that powered version 2.21 of the application.

  10. Data Matrix - Wikipedia

    en.wikipedia.org/wiki/Data_Matrix

    An example of a Data Matrix code, encoding the text: "Wikipedia, the free encyclopedia". A Data Matrix is a two-dimensional code consisting of black and white "cells" or dots arranged in either a square or rectangular pattern, also known as a matrix. The information to be encoded can be text or numeric data. Usual data size is from a few bytes ...

  11. 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 ...

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