A merchant services company carefully expanded its use of Shadowbase data replication over the years. The company initially used data replication to provide a uni-directional active/passive data recovery capability for its CMA. After feeling comfortable with this use of data replication, the company expanded its use of data replication technology to provide continuous availability for its multinode switch. Finally, it integrated heterogeneous applications (the fraud detection system) via data replication. This case study demonstrates the many uses of data replication engines in mission-critical applications.