A payment system is a system (including physical or electronic infrastructure and associated procedures and protocols) used to settle financial transactions in Automated teller ...
http://en.wikipedia.org/wiki/Payment_system
Heartland Payment Systems® , one of the nation's largest payments processors, processes all payments – from credit/debit/prepaid cards to online transactions, checks ...
http://www.heartlandpaymentsystems.com/
Payment Systems Resources ... This site is sponsored by CRAFTS, MACHA & NEACH as a starting point for the Financial Services Industry to use when connected to the Internet.
http://www.paymentsystems.org/
PSG provides payment solutions for: ● Electronic Funds Transfers ● Check Printing ● Credit Card Processing ● B2B Payments ● Equity Acceleration
http://paymentsystemsgroup.com/