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2. 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.

3. Merchant account - Wikipedia

   en.wikipedia.org/wiki/Merchant_account

   A merchant account is a type of bank account that allows businesses to accept payments in multiple ways, typically debit or credit cards. A merchant account is established under an agreement between an acceptor and a merchant acquiring bank for the settlement of payment card transactions. In some cases a payment processor, independent sales ...

4. 3-D Secure - Wikipedia

   en.wikipedia.org/wiki/3-D_Secure

   3-D Secure. Not to be confused with card security code. 3-D Secure is a protocol designed to be an additional security layer for online credit and debit card transactions. The name refers to the "three domains" which interact using the protocol: the merchant/acquirer domain, the issuer domain, and the interoperability domain. [1]

5. AzeriCard - Wikipedia

   en.wikipedia.org/wiki/AzeriCard

   1996 ; 28 years ago(1996) in Baku, Azerbaijan. Headquarters. Azerbaijan. Services. card processing. Parent. International Bank of Azerbaijan. AzeriCard is an Azerbaijani bank card processing company. [1] The International Bank of Azerbaijan owns 100 percent of AzeriCard.

6. 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 ...

7. American Express - Wikipedia

   en.wikipedia.org/wiki/American_Express

   Amex had a 4.61% worldwide market share by payment volume in 2022, compared to 38.73% for Visa and 24% for Mastercard. While American Express credit cards are accepted at 99% of US merchants that accept credit cards (Costco being the notable exception), they are much less accepted in Europe and Asia.