The R4 Enterprise ERP software aligns customer demand with supply. Give your company the ability to deliver to customers on time, all the time. The R4 Enterprise System operates in a truly open environment with mainstream operating systems, such as Windows and Unix’s various flavors (Aix, SCO, HP-UX, Linux, etc. ). The application runs on any popular hardware platform, including IBM, DELL, HP, SUN, etc. Royal 4 Systems has hundreds of installations on 6 continents, including the US, Latin America, Canada, Australia, Europe, and Africa.