A computer the size of a credit card is nothing new. There have been many single-board computers following the familiar ...

Discover cards are currently not available on CNBC Select and links have been redirected to our credit card marketplace where you can review offers from other issuers like American Express or Chase.

Personal and small business cards issued by Discover are currently not available on CNBC Select and links have been redirected to our credit card marketplace where you can review offers from other ...

If a business wants to offset processing fees, you could have to pay a surcharge for using a credit card. However, if you want to avoid this fee, pay with your debit card, cash or check. Paying a ...