I used to work for EDS (now HP Enterprise Services) about 6 years ago sub-contracting for Xerox. Most of the systems they (Xerox) used for selling/maintenance (

I used to work for EDS (now HP Enterprise Services) about 6 years ago sub-contracting for Xerox. Most of the systems they (Xerox) used for selling/maintenance (order processing, invoicing, etc) of printers were written in COBOL for the IBM System/360 mainframes (which I think were replaced by the System/Zs).