The System/360-370 Family - IBM Mainframe

Without doubt, the most popular family of mainframe computers ever is the System/360-370 family, introduced by IBM more than 20 years ago. The original System/360 was smaller than the smallest of today's microcomputers, offering only 8K of main storage. Today, the largest member of the family can be configured with more than 80,000 times as much main storage: 640M bytes.

As IBM enhanced the capabilities of the System/360 processors, it periodically assigned new names to them. In the 1970s the most popular processor was the System/370. This was replaced in the 1980s by the 3080 and 3090 processors. Other popular processors include the 4300 series and the 9370. In 1990, a new line of processors called the System/390 (S/390) was introduced. Because all these processors are compatible with the basic System/360-370 instruction sets and can run the same operating systems, they are all commonly referred to as System/360 or System/370 processors.

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