ACI Worldwide (NASDAQ: ACIW) is a payment systems company headquartered in Naples, Florida. ACI's products and services are designed to facilitate electronic payments and are used principally by financial institutions, retailers and electronic payment processors. ACI's portfolio of products generally addresses four primary market segments: * Retail banking, including debit and credit card issuers * Wholesale banking, including corporate cash management and treasury management operations * Retailers * Bill Pay Solutions