Visa International - www.visa.com

Master Card International - www.mastercard.com

Discover Card - http://www.discover.com

Global Payments - http://www.globalpaymentsinc.com

American Express - http://www.americanexpress.com

Authorizenet - http://www.authorizenet.com

Verifone - http://www.verifone.com

PCI Council - http://www.pcisecuritystandards.org