Redirected from System 390
System/390 is a series of IBM mainframe models. Successor to the System/370s, and more specifically the System 370/ESAs[?]. Rebranded as zSeries.
... or older. The median age is 36 years. For every 100 females there are 96.3 males. For every 100 females age 18 and over, there are 91.6 males. The median income for a ...