coondoggie writes: Talk about two systems that are worlds apart. Network management vendor William Data Systems says it has created an Apple iPhone app that lets users manage IBM's z/OS mainframe environment. Specifically the iPhone app lets users tie into WDS' ZEN z/OS network management suite running on the mainframe. ZEN is made up of a variety of packages that let users monitor network performance, usage and activity displays, system alerts and security. The company touts Zen as a replacement for the venerable IBM NetView mainframe monitoring system.