3PEA International
ACI Worldwide
Aconite
Aetna
Affordable Payment Solutions
American Conference Institute
American Express
American General Finance
AOL
Apple
Apriva
Atos Worldline
Bank of America
Banka Koper
Best Buy
Brooks FI Solutions
Brookwood Capital
Capital One
Card Protection Plan
Caremark
Charter One
Citibank
Clear2Pay
ClickandBuy
CMP Media
Coinstar
Commerce Bank
DIB & Associates
Discover Financial Services
DuPont
Ecount
EDB Business Partner
EFD (eFunds)
Egytec Engineering
Elan Financial Services
ETA
Experian
Fair Isaac
Fast Transact
First Data Corp.
Fishback Financial
GE Money
Georgia Pacific
Global Analytics
Google
GratisCard
HP
HSBC
Hypercom
i2c inc.
IBM

ICMA
Intel
Intelligent Results
Interac
IranKhodro Card
Jo-Ann Stores
JPMorgan Chase
LINK
MasterCard
Modulo
MSN
NACHA
NetSpend
Newtek Business Services
Nomad Software
Office Depot
Pax Technology
Paymetric
PayMotion
PayPal
Rahaxi Processing
RBS Lynk
RS Software
RSA
Ruesch International
Sage Payment Solutions
Sapphire Mobile Systems
Secure Check
Shoppers Charge Accounts
Shore Cliff Communications
Smart Cards/Smart Label
SMi Group
Speer & Associates
TASQ TEchnology
TD Banknorth
Tio NEtworks
TNB Card SErvices
Transaction System Architects
TransFirst
Trycera Financial
TSYS Acquiring
Ukash
Visa
VocaLINK
VoiceVerified
WageWorks
Wal-Mart
Washington Mutual
Way Systems
Wells Fargo
Western Union