Banks and Retailers Around the World Step Up to the Processing Power of ACI Worldwide's BASE24 6.0.

Business Editors & Technology Writers

OMAHA, Neb.--(BUSINESS WIRE)--Aug. 27, 2002

Latest Release of ACI Software Supports EMV and Multicurrency

While Streamlining Back-Office Processes

ACI Worldwide (Nasdaq:TSAIE), a leading international provider of enterprise e-payment solutions, today announced the worldwide adoption of BASE24(R) 6.0, the latest release of its world-class e-payment processing software. More than 30 financial institutions, retailers and processors around the world are live and in production with release 6.0, and more than 70 additional customers are in the process of implementing it.

Customers in production include:

-- ABSA Group, Ltd. (South Africa)

-- Bank One (United States)

-- CEKAB (Sweden)

-- Comercial Mexicana (Mexico)

-- Giro Bankcard, Ltd. (Hungary)

-- El Palacio de Hierro (Mexico)

-- National Credit Card Center of R.O.C. (Republic of China)

In addition to BASE24's proven fault-tolerant processing power, the latest release provides global EMV and multicurrency support, while helping to streamline back-office processes.

EMV Support

Card associations in many regions are mandating the migration to technology that conforms to EMV standards. Customers using BASE24 6.0 can acquire EMV transactions from ATM and POS devices, authenticate transactions via interfaces to security models, and route and authorize EMV transactions while linking to Visa, Europay, and MasterCard's BankNet, MDS and Maestro networks as well as national networks such as LINK in the UK.

Multicurrency Support

To support new delivery channels allowing consumers to shop and bank almost anywhere in the world, BASE24 6.0 gives users the ability to acquire transactions in different currencies and apply them to accounts operated in many currencies. There is no limit to the number of currencies that can be used, allowing financial institutions to migrate through currency change (as has been the case for ACI's European customers accepting the euro) and allowing financial institutions and network providers to operate centralized processing centers that cover multiple countries and currencies using a common BASE24 platform.

Architectural Expansion

Release 6.0 includes architectural enhancements that make it easy for customers to add new transaction types, device interfaces and functional enhancements as e-payment technologies evolve. New services can be added with minimal system impact, resulting in faster time to market, improved customer service, and reduced expense. BASE24 6.0 is also the platform for enhancements such as triple DES support and remote initial key download.

"BASE24 6.0 is the culmination of years of investment to keep our software best in class," said Mark Vipond, president of ACI Worldwide. "The outstanding adoption rate by customers validates our efforts. BASE24 runs many of the world's most demanding online e-payment systems -- those customers demand the best, and we are committed to providing them with features and performance that are second to none."

More than 330 financial institutions, retailers and processors worldwide use BASE24 to acquire, route and authorize online e-payment transactions through physical and virtual channels such as mobile phones, PCs, ATMs, merchant Web sites and traditional retail outlets. BASE24 operates on HP NonStop servers to provide scalable, 24/7 processing power for e-payment systems.

About ACI Worldwide

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. Twenty billion times a year, ACI software is used to process these transactions, powering the world's online payment systems. ACI was founded in 1975 and pioneered the development of applications and networking software for online transaction processing. Today more than 530 customers in 71 countries use ACI supplied software. Visit ACI Worldwide on the Internet at www.aciworldwide.com.

Any statements in this press release regarding projected results are preliminary and "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995. In addition, this press release may contain other forward-looking statements including statements regarding Transaction Systems Architects, Inc.'s ("TSA"), its subsidiaries or third parties' expectations, predictions, views, opportunities, plans, strategies, beliefs, and statements of similar effect. The forward-looking statements in this press release are subject to a variety of risks and uncertainties. Actual results could differ materially. Factors that could cause actual results to differ include but are not limited to the following.

TSA's business is concentrated in the banking industry, making it susceptible to a downturn in that industry.

TSA is subject to risks of conducting international operations including: difficulties in staffing and management, reliance on independent distributors, fluctuations in foreign currency exchange rates, compliance with foreign regulatory requirements, variability of foreign economic conditions, and changing restrictions imposed by U.S. export laws.

Fluctuations in quarterly operating results may result in volatility in TSA's stock price. No assurance can be given that operating results will not vary. TSA's stock price may also be volatile, in part due to external factors such as announcements by third parties or competitors, inherent volatility in the high-technology sector and changing market conditions in the industry.

For a detailed discussion of these and other risk factors, interested parties should review TSA's filings with the Securities and Exchange Commission.