On Jan 21,  1:48pm, Tom I Helbekkmo wrote:
} 
} Nevertheless, Adobe has defined that a correctly conforming PostSript 
} file starts with the two characters %!.

     Wrong.  According to Chapter 3 of the second edition of the
PostScript Language Reference Manual, there is no structure
requirements for a PostScript program.  The "%!" notation is part of
the Document Structuring Conventions, an optional part of the language
described in Appendix G.

}-- End of excerpt from Tom I Helbekkmo