Every second of every day, consumers are initiating electronic payment transactions — getting cash at ATMs, using debit and credit cards to make purchases in stores and on the Internet, banking by phone and PC, paying bills online. Over 40 billion times a year, ACI software is used to process these transactions, powering the world's online payment systems.

With millions of transactions to process every day, ACI needed technology that could meet peak performance requirements and sustain maximum throughput. ACI considered a number of databases during the design phase of the project. Only the ISAM architecture of c-tree could consistently sustain the required performance levels. This performance, truly the hallmark of c-tree, continued to grow as the hardware horsepower of the project was put in place and optimized.

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