Instructs the assembler to produce the External Symbol
Dictionary section of the assembler listing.
The ESD contains the external symbol dictionary information that is
passed to the linkage editor or loader, or z/OS binder,
in the object module.
NOESD
Instructs the assembler not to produce the External Symbol
Dictionary section of the assembler listing.
On z/VSE,
you can specify this option on the JCL OPTION statement.