Open Market Inc. said it has added a Visa Purchasing card module to its Transact electronic commerce software.

The system includes sales-tax compliance, spending guidelines, and streamlined expense reconciliation, the companies said.

"The result is an environment that expands the utility of Purchasing cards by increasing the number of suppliers available for corporations and government agencies that can benefit from the card's richer data," said Ryan Ross, Visa U.S.A. vice president for electronic commerce acceptance.

Paymentech Inc., the Dallas-based merchant processing subsidiary of Banc One Corp., signed to be the first to process and settle Visa Purchasing transactions with Transact software. Paymentech is the fifth-largest U.S. issuer of commercial cards.

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