Ever since the first version of the CPF operating system was shipped with the System/38, system administrators have grappled with the problems inherent in customizing the IBM-supplied CL command set. One major source of irritation was that when a new release of the operating system was installed, any changes made directly to the IBM supplied commands in the QSYS library were obliterated. So, for each new operating system release, the system administrator would have to re-apply all of the ...

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