&SYSTEM_ID System Variable Symbol

Use &SYSTEM_ID to obtain the name and release of the operating system under which your source module is being assembled. &SYSTEM_ID has a global scope.

For example, on z/OS, &SYSTEM_ID might contain one of the following:

z/OS 01.04.00
z/OS 01.05.00
... etc.

on CMS, &SYSTEM_ID might contain one of the following:

CMS 18
CMS 19
... etc.

on z/VSE, &SYSTEM_ID might contain one of the following:

VSE/AF 6.6.0
... etc.

Notes:
  1. The value of the type attribute of &SYSTEM_ID (T'&SYSTEM_ID) is always U.
  2. The value of the count attribute (K'&SYSTEM_ID) is the number of characters assigned.

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