Columbia University will find that after they've barcoded about 100
microfiche, they'll have a handful of envelopes which they can't use.
Unless you alternate the position of the barcode on the envelope, you
will end up with a very fat mass existing in the area where ALL the
barcodes are and a lot of air where barcodes are not.  You won't be able
to fit as many fiche into a tray, either.  Nor will people required to
file or refile in the fiche cabinets want to continue doing that job.
Kate Herzog, University at Buffalo Science & Engineering Library.