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The System/370 is a line of IBM mainframes introduced in the early 1970s as the successor to the System/360 family. New architectural features distinct from the 360 range include dual-processor capability as standard, and full support for virtual memory processing (plus 128-bit floating point numbers).

For the 1980s IBM extended the line with the 370/XA series, and then for the 1990s came up with the 370/ESA series, featuring an enhanced address space. In a marketing effort to emphasize the system's timeliness, the 370/ESA was eventually rebranded as the System/390. Similarly, in IBMs product range wide renaming process at the turn of the millennium, the System/390 range got its present name, the zSeries. Under its original name, then, the System/370 range had a market life of roughly 20 years, and, albeit having undergone significant architectural changes, still exists in the guise of the zSeries.

Notable machines in the 370 range include the IBM 3033 , the IBM 3090 mainframe/supercomputer with an optional vector facility (VF) extension, and the relatively inexpensive low-end IBM 9370 , tailored for small-to-medium size businesses. Compatible System/370 competitors include the Amdahl 470 range.

IBM hardware Mainframe computers

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Topics: System/370, Systems Concepts, Systems Engineering, Systematics...

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