> I've never heard of anyone suggesting you could copy data from one
> port to another, if only because there's no such thing as an open
> file in postscript.

Actually, PostScript does have open files; find a Red Book, look up the
"file" operator, and follow the pointers to elsewhere. (Many/most
PostScript-capable devices do not have anything of significance by way
of a filesystem, but that's a different issue entirely.)

> Of course if you had a postscript printer AND a the postscript
> cookbooks you'd instantly get a better understanding.

And if you actually read the Red Book, _you_'d get a better
understanding. In the Second Edition Red Book, for example, you'd want
to read section 3.8, "File Input and Output".

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