"ADP tech chief Stuart Sackman says his company is under constant attack globally and is hoping to encrypt more of its data using the new technology. A sixty year customer of IBM, ADP currently runs its largest domestic payroll engine on the systems, calculating 20 million paychecks per pay period, while also running its money movement, tax filing systems and cloud-based software suite on versions of the Z-series mainframes."

https://www.forbes.com/sites/alexkonrad/2017/07/17/ibm-seeks...