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2. Square (financial services) - Wikipedia

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

   Square Reader is Payment Card Industry Data Security Standard compliant and Verisign certified. [22] Square provides its magnetic stripe card readers to sellers without charge. [54] Square charges $99 for Square Stand and $59 for its chip-based Square Reader. [55] The Square app is freely downloadable from the Apple App Store and the Google ...

3. Payanywhere - Wikipedia

   en.wikipedia.org/wiki/Payanywhere

   Merchants may accept payments on their smartphone via a Bluetooth card reader or on an in-store “Storefront” solution [buzzword] featuring a tablet and stand, which was introduced on April 8, 2014. [1] PayAnywhere offers credit card readers and apps that are compatible with both Apple and Android devices. [2]

4. 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.

5. Block, Inc. - Wikipedia

   en.wikipedia.org/wiki/Block,_Inc.

   In October 2011, the company stated that it was processing about US$2 billion per year in payments through its "Square" card readers, charging 2.75 percent per swipe. [ 45 ] In 2012, Starbucks and Square announced a partnership that would allow Starbucks to use the Square payment technology to accept payments for coffee.

6. Near-field communication - Wikipedia

   en.wikipedia.org/wiki/Near-field_communication

   In "card emulation mode" an NFC device should transmit, at a minimum, a unique ID number to a reader. In addition, NFC Forum defined a common data format called NFC Data Exchange Format (NDEF) that can store and transport items ranging from any MIME -typed object to ultra-short RTD-documents, [ 68 ] such as URLs .

7. 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.