What is the visa mastercard all about?

MasterCard Worldwide NYSE: MA is a membership organization owned by the 25,000+ financial institutions that issue its card. MasterCard is also the company's brand of credit cards. It was originally created by United California Bank, Wells Fargo, Crocker National Bank, and the Bank of California as a competitor to the BankAmericard issued by Bank of America. BankAmericard is now the VISA credit card, issued by Visa International.