The following control variables provide information about the system environment under which the CLIST is executing.

You can use these control variables in your CLISTs for different purposes. For example, the variables &SYSNAME, &SYSPLEX, &SYSCLONE, and &SYSSYMDEF allow you to write common CLISTs that are to run in a sysplex environment. You can build or identify the system-specific data set names by using the values returned by these control variables.