The entire partition, or Multiple Virtual Storage ( MVS ) region, operated with the same memory protection key including the CICS kernel code.
2.
The larger models used Multiprogramming with a Fixed number of Tasks ( MFT ), which evolved into OS / VS1, and Multiprogramming with a Variable number of Tasks ( MVT ), which evolved into OS / VS2 ( SVS ) ( Single Virtual Storage ) and then MVS ( Multiple Virtual Storage ).
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