VMS Help CREATE, /TERMINAL, Qualifiers, /WAIT  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /WAIT
       /NOWAIT (default)

    Requires that you wait for the subprocess to terminate before
    you enter another DCL command. The /NOWAIT qualifier allows
    you to enter new commands while the subprocess is running. This
    qualifier is used only with the /NODETACH qualifier.