I have experienced 35 years or so with PROIV application software on many platforms. Although PROIV does not have all the bells and whistles on the mainframe as it does with other platforms; the IBM Z systems makes it very robust due to it's integration with CICS; very secure integrated with RACF and flexible to develop. It is the perfect solution for running number crunching customer services with a high degree of security and capacity of IBM Z systems and the easy integration of screens and batch via PROIV