I have recently seen a comment in a prior co-worker's assembler code which used 
STCKE to retrieve the TOD "Programmable Field" contents:

"The Field contains a value, assigned by z/OS, which uniquely identifies a 
current LPAR in the SYSPLEX of machines."

Is this a true statement, and if so is it documented anywhere?

If true, is the value unique to the CPU or to the LPAR or to the CPC or . . . ?

Peter

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