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2. Credit card imprinter - Wikipedia

   en.wikipedia.org/wiki/Credit_card_imprinter

   Credit card imprinter. Manual card imprinter. Another type of manual card imprinter (Janome M220) with a smaller sliding handle. 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 ...

3. Contactless payment - Wikipedia

   en.wikipedia.org/wiki/Contactless_payment

   Contactless payment systems are credit cards and debit cards, key fobs, smart cards, or other devices, including smartphones and other mobile devices, that use radio-frequency identification (RFID) or near-field communication (NFC) for making secure payments. The embedded integrated circuit chip and antenna enable consumers to wave their card ...

4. Square (financial services) - Wikipedia

   en.wikipedia.org/wiki/Square_(financial_services)

   Square (financial services) Square is a point-of-sale system designed for small and medium-sized businesses. [1] Launched in 2009 by Block, Inc., [2] it allows sellers to accept card payments and manage various business operations. As of 2023, Square leads the U.S. point-of-sale systems market, [3][4][5] serving 4 million clients and processing ...

5. Why businesses are not using credit card chip readers - AOL

   www.aol.com/finance/2016-04-12-why-businesses...

   Retailers are now responsible for any money lost owing to credit card fraud if they do not use a chip reader, and while some large retailers have readers installed, not all of them are actively ...

6. Card reader - Wikipedia

   en.wikipedia.org/wiki/Card_reader

   A card reader is a data input device that reads data from a card-shaped storage medium and provides the data to a computer. Card readers can acquire data from a card via a number of methods, including: optical scanning of printed text or barcodes or holes on punched cards, electrical signals from connections made or interrupted by a card's punched holes or embedded circuitry, or electronic ...

7. Radio-frequency identification - Wikipedia

   en.wikipedia.org/wiki/Radio-frequency_identification

   Radio-frequency identification (RFID) uses electromagnetic fields to automatically identify and track tags attached to objects. An RFID system consists of a tiny radio transponder called a tag, a radio receiver, and a transmitter. When triggered by an electromagnetic interrogation pulse from a nearby RFID reader device, the tag transmits ...