<<Disclaimer: Verify this information before applying it to your situation.>> M>>An interesting concept, but you would still need the co-operation of the M>>manufacturer to properly encode the package. M>against its own database. In practice it would be easy to use a PC program M>to prepare the list of numbers and send it into the device. M> M>Don Wiss. Companies will not acknowledge if they have contaminated through process and will not divulge proprietary information. How is this info going to get into a barcode? Good concept -How to DO? AMS