PAUSE [string]

Displays a message, then pauses and waits for a keypress.  If the keypress is
Command-. (Apple-Period), the utility returns a -1 error code to the shell,
which will then normally abort the current process.  If [string] is not
supplied, the utility will display the default string.

Parameter:

    string  -   An ASCII string containing the message that the utility is to
                display prior to waiting for a keypress.  The utility will
                display any and all characters following the space after the
                command name.  For example:

                Pause "Please press any key to continue the backup process"

                will display

                "Please press any key to continue the backup process"

                (Notice the leading and trailing quote characters.)
