9c3a3d9f_Basic_CLIST_commands__Its_USE
[S.No] 88 [Clist Command] PROC [Its USE] 
The PROC statement defines the parameters to be passed to a CLIST when it is invoked, or (for TSO/E R4 and above only) defines the beginning of a subprocedure within a CLIST.
Basic CLIST commands
Its USE