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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 code payment - Wikipedia

    en.wikipedia.org/wiki/QR_code_payment

    A QR code payment is a mobile payment method where payment is performed by scanning a QR code from a mobile app. [1] This is an alternative to doing electronic funds transfer at point of sale using a payment terminal. [2] This avoids a lot of the infrastructure traditionally associated with electronic payments such as payment cards, payment ...

  4. Mobile payment - Wikipedia

    en.wikipedia.org/wiki/Mobile_payment

    QR, or "quick response", bar codes were designed to contain the meaningful information directly in the bar code. QR codes can be of two main categories: [ 49 ] [ citation needed ] The QR code is presented on the mobile device of the person paying and scanned by a POS or another mobile device of the payee

  5. Internet of things - Wikipedia

    en.wikipedia.org/wiki/Internet_of_things

    The GS1 digital link standard, [201] first released in August 2018, allows the use QR Codes, GS1 Datamatrix, RFID and NFC to enable various types of business-to-business, as well as business-to-consumers interactions. Parent organization comprises member organizations such as GS1 US: IEEE: Institute of Electrical and Electronics Engineers

  6. Digital wallet - Wikipedia

    en.wikipedia.org/wiki/Digital_wallet

    A digital wallet, also known as an e-wallet or mobile wallet, is an electronic device, online service, or software program that allows one party to make electronic transactions with another party bartering digital currency units for goods and services. This can include purchasing items either online or at the point of sale in a brick and mortar ...

  7. List of free and open-source Android applications - Wikipedia

    en.wikipedia.org/wiki/List_of_free_and_open...

    Android Open Source resources and software database. F-Droid Repository of free and open-source Android software. PRISM Break – curated list of security focused open-source alternatives to mitigate some threats of PRISM, XKeyscore and Tempora. Droid-Break – curated list of general purpose open-source alternatives.

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