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.
... and 192 families residing in the town. The population density is 245.1/km² (635.7/mi²). There are 545 housing units at an average density of 167.0/km² ...