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2. Payment terminal - Wikipedia

   en.wikipedia.org/wiki/Payment_terminal

   PAX Technology S90 credit card terminal with a Visa card inserted.. A payment terminal, also known as a point of sale (POS) terminal, credit card machine, card reader, PIN pad, EFTPOS terminal (or by the older term as PDQ terminal which stands for "Process Data Quickly" [1]), is a device which interfaces with payment cards to make electronic funds transfers.

3. Credit card imprinter - Wikipedia

   en.wikipedia.org/wiki/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 terminals.

4. 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 ...

5. Square (financial services) - Wikipedia

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

   It accepts credit card payments by connecting to a mobile device's audio jack. The original version consisted of a read head directly wired to a 3.5 mm audio jack, through which unencrypted, analog card information was fed to smartphones for amplification and digitization. [53] Square Reader also supports Apple Lightning on post-2018 products.

6. RFID skimming - Wikipedia

   en.wikipedia.org/wiki/RFID_skimming

   Most modern mobile telephones running Android OS have a built in NFC reader that can be used to unlawfully scan contactless payment cards. A criminal can hide the scanner e.g. inside a glove or a bag, and then place it close to the victim and wirelessly steal the victim's payment card information. [2] With the wirelessly obtained payment card ...

7. Proximity card - Wikipedia

   en.wikipedia.org/wiki/Proximity_card

   A proximity card or prox card [1] also known as a key card or keycard is a contactless smart card which can be read without inserting it into a reader device, as required by earlier magnetic stripe cards such as credit cards and contact type smart cards. [2] The proximity cards are part of the contactless card technologies.