[OS] The TYPE keyword on the CTRLPROG macro in the Stage 1 input specifies the type of control program. By Release 13 the old terms SSS, MSS and MPS had been replaced by PCP, MFT and MVT. The later M65MP type is a variation of MVT. The SCHEDULER macro in the Stage 1 input specifies the type of scheduler; Release 13 still used the values SEQ...
Found on
http://en.wikipedia.org/wiki/System_Generation_(OS)

In computing System generation or sysgen is the process of creating a particular unique instance of an operating system by combining user-specified options and parameters with manufacturer-supplied general-purpose program code to produce an operating system tailored for a particular hardware and software environment. Some other programs have simil...
Found on
http://en.wikipedia.org/wiki/System_generation
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