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In article <1894@chinacat.Unicom.COM> woody@chinacat.Unicom.COM
 (Woody Baker @ Eagle Signal) writes:
>NONE of my files use the %!.  It is merely a commenting
>structure having to do with EPS. (Encapsulated postscript).

You're either oversimplifying for this novice, or you've never learned
the difference between the Document Structuring Conventions and the
Encapsulated PostScript specifications.  "%!" is a magic cookie that
identifies any PostScript file, usually for the convenience of a
spooler (even if you don't need it, it's nice to put it in if you
distribute your PostScript code).  The stricter form "%!PS-Adobe-a.b"
claims conformance with version a.b of the DSC, and the
bondage-and-discipline form "%!PS-Adobe-a.b EPSF-c.d" claims that it
conforms to the stricter rules of version c.d of the EPS
specifications.  All in the name of clarity, of course.

  Both of them are quite useful to anyone who doesn't live in a
single-user world, or makes regular use of good text-processing
software.  Try making an arbitrary PS file print out two-up,
double-sided, in signature order.

>EPS has been defined by Adobe, but it has wound up being a real rats nest
>of complexity.

Nope.  The specifications (both DSC and EPS) are pretty clear.  Each
revision is better than the previous one, and usually special-cases
common mistakes that have found their way into the marketplace.  The
problem is usually programs that generate bad code and refuse to
accept anything that isn't broken the same way.
--
J Greely (jgreely@cis.ohio-state.edu; osu-cis!jgreely)