This document summarizes a presentation given at an IBM System z summit. It discusses Payment Solution Providers' (PSP) migration from HP Blade servers running Oracle to IBM System z running z/OS, WebSphere and DB2 for their payment processing division. The key benefits of System z for PSP included reliability for 24/7 processing of millions of transactions daily, scalability to handle spikes in transaction volume, and ability to process thousands of transactions per second from many concurrent users. System z also helped PSP achieve cost reduction goals and faster application development times.