ACI Worldwide (NASDAQ: ACIW) is a payment systems company headquartered in Naples, Florida. ACIs products and services are designed to facilitate electronic payments and are used principally by financial institutions, retailers and electronic payment processors. ACIs portfolio of products generally addresses four primary market segments: ACI was founded in Omaha, Nebraska as Applied Communications Inc in 1975 to develop software for communications applications making use of the new NonStop computers from the then Tandem Computers. Many early projects involved building systems to handle ATMs, front ending the bank core banking systems, which led to the launch of the first product, BASE24, in 1982. Over time BASE24 was expanded to service transactions from other channels such as POS terminals and branch systems. And the product portfolio grew to cover more functions around card transactions such as clearing and settlement and fraud detection. The hardware utilised for these products was also expanded to include suppliers including IBM, HP, Stratus and Sun Microsystems.