Parameter in IEASYSxx (or supplied by the operator)

PAK={aa             }
    {(aa,bb,...[,L])}
    {(,L)           }

The two characters (A-Z, 0-9, @, #, or $), represented by aa (or bb, etc.), are appended to IEAPAK to form the name of the IEAPAKxx parmlib member(s). If the ‘L’ option is specified, the system displays the contents of the IEAPAKxx member(s) at the operator's console when the system processes the member(s).