4 ms·

Huh. I hadn't even heard of Discover.

• HenryBemis 3y ago
  Visa, Mastercard, American Express, Discover, JCB are the five that started PCI-DSS [1]: https://en.wikipedia.org/wiki/Payment_Card_Industry_Data_Security_Standard https://en.wikipedia.org/wiki/Payment_Card_Industry_Data_Sec... [2]: https://www.pcisecuritystandards.org/ https://www.pcisecuritystandards.org/
• willcipriano 3y ago
  You had yet to discover them.
• lxgr 3y ago
  It's the company that now owns Diners Club (and is better known under that name in many countries other than the US), who in turn invented credit cards way back :)
  • wayfinder 3y ago
    They did not invent credit cards. Diners Club was a charge card. They did not invent that either. American Airlines had their own charge card a few decades before. They did start the first payment card that wasn’t linked to a specific company (i.e. the American Airlines card).
    • lxgr 3y ago
      The invention was having a card accepted across a wide range of merchants (all under different ownership). Store accounts/cards have indeed been around significantly longer. The distinction between a credit and a charge card is not that relevant in that context, in my view: For both, you spend an issuer’s money at unaffiliated merchants and pay the issuer back later.