On 15 Sep 97 at 16:04, Harold Hallikainen wrote:

> On Mon, 15 Sep 1997 05:56:22 -0400 Kahn-Syd <klass@SUN-LINK.COM>
> writes:
> > What Kind of barcode am I decoding - (The easiest to decode ?- sorry
> >;-)
> >well I have already found a 3 of 9 bar code freeware font on the net
> >and
> >that seemed to solve one part - getting the stickers for the books.
> >unless
> >you suggest something otherwise.  they have nothing now and I could
> >use
> >anything.
>
>
>         Lots of books already have a bar code on the back cover.
>         One
> that I just looked at SEEMS to be related to the ISBN number... but
> is not it exactly.  Might be nice to use the existing numbering
> system and bar codes, though this would not allow you to keep track
> of individual copies of duplicate sets.

Which is the dilemma between selling multiple quantities of an
identical item, and using the barcode as a asset number.  Since ppl
don't need to remember barcodes, why not add an extra, say, 128 bits
at the manufacture stage, starting at 0 for every unique product.
You wouldn't need to store the entire number, hashing it with the
unique product number would do...
MikeS
<mikesmith_oz@nosp*m.relaymail.net>
(remove the you know what before replying)