The initialization file contains NCL commands that are executed
    when you start NCL; that is, before you receive the NCL prompt.

    Alternatively, the initialization file is executed prior to
    executing an NCL script file that is specified as part of a DCL
    command line. In the following example, the initialization file
    will be executed before the ROUTING.NCL script:

    $ ncl @routing.ncl

1  –  OpenVMS

    NCL uses the default file name SYS$LOGIN:NCL$INIT.COM unless
    you have defined an alternative file use the NCL$INIT logical.

    To use NCL$NODEA_INIT.COM as an initialization file, use the
    following DCL define command:

    $ define ncl$init ncl$nodea_init.com

    When NCL starts up, it will check for the file
    NCL$NODEA_INIT.COM, and if it exists, will execute the ncl
    commands within it.

2  –  Tru64 UNIX

    For Tru64 UNIX, if the file .nclrc exists in the user's
    top level directory, the command within it will be executed
    automatically when NCL is started.