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2. Zettle - Wikipedia

   en.wikipedia.org/wiki/Zettle

   Zettle reader. Zettle by PayPal (previously known as iZettle [1]) is a Swedish financial technology company founded by Jacob de Geer and Magnus Nilsson in April 2010. Launching its first app and service in 2011, [3] the company offers a range of financial products including payments, point of sales, funding and partners applications.

3. 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 ...

4. PayPal - Wikipedia

   en.wikipedia.org/wiki/PayPal

   150,000 PayPal cards frozen. In 2015, 150,000 Spanish cardholders had their funds frozen in an apparent fraud case involving a PayPal service provider, Younique Money, which was the de facto administrator of the cards. Previously, PayPal had charged €15 to all its card users without authorization (150,000 users).

5. What Is a Digital Wallet and How Do They Work? - AOL

   www.aol.com/digital-wallet-182547764.html

   Samsung Pay: Can be used for nearly any merchant, because it works with credit card readers. PayPal: Is used most often for person-to-person payments but is also widely accepted by online merchants.

6. Punched card input/output - Wikipedia

   en.wikipedia.org/wiki/Punched_card_input/output

   Punched card input/output. An IBM 80-column punched card of the type most widely used in the 20th century. IBM 1442 card reader/punch for 80 column cards. A computer punched card reader or just computer card reader is a computer input device used to read computer programs in either source or executable form and data from punched cards.

7. Square (financial services) - Wikipedia

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

   Square is a financial services platform by Block, Inc. for small and medium-sized businesses. [1] [2] It enables accepting credit card payments using smartphones as POS registers, and facilitates various business operations. As of 2023, Square reports 4 million merchant clients and an annual payment value of US$ 210 billion.