Library /sys$common/syshlp/latcp$help.hlb CREATE, SERVICE, Qualifiers, /APPLICATION  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Specifies that the created service is an application service. An
    application service offers a specific application on the service
    node rather than a general interactive service. You can define a
    dedicated port for the service by using the CREATE PORT and SET
    PORT commands.