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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. 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.

  4. List of most-downloaded Google Play applications - Wikipedia

    en.wikipedia.org/wiki/List_of_most-downloaded...

    This is the list of the Google Play apps with more than 500 million, and less than one billion downloads on unique devices: App. Developer. Date Reached [j] Date Published [k] Category. Pre-installed [l] LINE: Calls & Messages [218] Line Corporation.

  5. Card reader - Wikipedia

    en.wikipedia.org/wiki/Card_reader

    A business card reader is a portable image scanner device or mobile app that uses optical character recognition to detect specific data fields on a business card and store that data in a contact database or 'electronic rolodex'.

  6. Contactless smart card - Wikipedia

    en.wikipedia.org/wiki/Contactless_smart_card

    A contactless smart card is a card in which the chip communicates with the card reader through an induction technology similar to that of an RFID (at data rates of 106 to 848 kbit/s). These cards require only close proximity to an antenna to complete a transaction.

  7. Eye-Fi - Wikipedia

    en.wikipedia.org/wiki/Eye-Fi

    Scanner support. Some portable document scanners such as the Doxie Go + Wi-Fi and the Xerox Mobile Scanner make use of an Eye-Fi card to provide Wi-Fi capability for document upload.

  8. Optical character recognition - Wikipedia

    en.wikipedia.org/wiki/Optical_character_recognition

    Widely used as a form of data entry from printed paper data records – whether passport documents, invoices, bank statements, computerized receipts, business cards, mail, printed data, or any suitable documentation – it is a common method of digitizing printed texts so that they can be electronically edited, searched, stored more compactly ...

  9. Credit card imprinter - Wikipedia

    en.wikipedia.org/wiki/Credit_card_imprinter

    A credit card imprinter, colloquially known as a ZipZap machine, click-clack machine or Knuckle Buster, is a manual device that was used by merchants to record credit card transactions before the advent of payment terminals.

  10. Biometrics - Wikipedia

    en.wikipedia.org/wiki/Biometrics

    Biometrics are body measurements and calculations related to human characteristics. Biometric authentication (or realistic authentication) is used in computer science as a form of identification and access control. It is also used to identify individuals in groups that are under surveillance . Biometric identifiers are the distinctive ...

  11. Barcode reader - Wikipedia

    en.wikipedia.org/wiki/Barcode_reader

    A barcode reader or barcode scanner is an optical scanner that can read printed barcodes and send the data they contain to computer. Like a flatbed scanner , it consists of a light source, a lens, and a light sensor for translating optical impulses into electrical signals.