How EXECIO uses memory (Central Storage).
STEM Variable
These are easily recognised by the presence of a period (.) immediately following the variable name.
This will be illustrated on the next page.
A sequence of REXX variables (z/OS only).
This will be a variable name to which EXECIO appends a numerical suffix which is incremented for each record retrieved
when the retrieval count is greater than 1.
This will be illustrated after the explanation on STEM usage.
A single REXX variable (z/VM only)
z/VM provides this as an alternative to both STEM and Program Stack on some EXECIO commands.
The Data Stack (z/OS) or Program Stack (z/VM)
Think of a queue of people, except that people can join the queue at either end.
This will be illustrated shortly.