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2. QR code - Wikipedia

   en.wikipedia.org/wiki/QR_code

   Both Android and iOS devices can natively scan QR codes without downloading an external app. The camera app is able to scan and display the kind of QR code along with the link . These devices support URL redirection , which allows QR codes to send metadata to existing applications on the device.

3. How to make payments with your phone - AOL

   www.aol.com/finance/payments-phone-164336000.html

   First, add your credit and/or debit cards to Apple Pay. Open the Wallet app on your iPhone, tap the plus sign and follow the instructions to add a new card to Wallet. Once you’ve added the card ...

4. Near-field communication - Wikipedia

   en.wikipedia.org/wiki/Near-field_communication

   HCE allows any Android 4.4 app to emulate an NFC smart card, letting users initiate transactions with their device. Apps can use a new Reader Mode to act as readers for HCE cards and other NFC-based transactions. On September 9, 2014, Apple announced support for NFC-powered transactions as part of Apple Pay.

5. Optical character recognition - Wikipedia

   en.wikipedia.org/wiki/Optical_character_recognition

   Video of the process of scanning and real-time optical character recognition (OCR) with a portable scanner. Optical character recognition or optical character reader (OCR) is the electronic or mechanical conversion of images of typed, handwritten or printed text into machine-encoded text, whether from a scanned document, a photo of a document, a scene photo (for example the text on signs and ...

6. vCard - Wikipedia

   en.wikipedia.org/wiki/VCard

   RFC 6350. vCard, also known as VCF (Virtual Contact File), is a file format standard for electronic business cards. vCards can be attached to e-mail messages, sent via Multimedia Messaging Service (MMS), on the World Wide Web, instant messaging, NFC or through QR code.

7. Barcode Scanner (application) - Wikipedia

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

   Website. Main site. Google Play. Barcode Scanner scanning a QR code. The application Barcode Scanner is an Android app, from the open-source project ZXing (short for Zebra Crossing ), that allows an Android device with imaging hardware (a built-in camera) to scan barcodes or 2D barcodes and retrieve the data encoded. [2]