To allocate a data set as a system output data set, issue the ALLOCATE command and specify the FILE operand and the SYSOUT operand followed by the output class enclosed in parentheses. The output class is a single letter defined by your installation.

ALLOCATE FILE(sysprt) SYSOUT(a)

The ALLOCATE command has operands used specifically with the SYSOUT operand, which control routing and formatting of the data when it is printed. Four of these operands are OUTDES, DEST, SPIN, and SEGMENT.