This excerpt taken from the CYBS 10-K filed Mar 11, 2008.
Enterprise Software: CyberSource Payment Manager
The CyberSource Payment Manager product is based on modular systems architecture that allows this server to be installed into large customer infrastructures where a dedicated payment gateway interface will be used. The CyberSource Payment Manager is designed as a three-layer software architecture well suited for enterprise deployment. These layers include the multiple sales channel interface, core server, and database. The CyberSource Payment Manager core server supports a common programming interface that can be adapted to multiple sales channel enterprise systems. These sales systems could be used in conjunction with a call center in order to accept orders through an interactive voice response unit, from a Web server using hypertext transfer protocol, from a point-of-sale terminal, or from a wireless application protocol device. The database layer is based on a standard structured query language interface, offering a choice of implementations with any of the standard relational database management systems on the market. Database platforms currently used by our customers include Microsoft SQL Server, Oracle, and Sybase.