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All the info about the product (name, description, price, etc) is not stored in the bar code itself. That bar code simply contains a unique ID number that is used to then cross-reference an entry in a database that contains all the data.
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Exactly what I was getting to earlier TSB8C.....Just to let everyone know, there is a type of barcode that can actually store more characters/info than a standard UPC-style barcode. These are called 2D Barcodes (aka. PDF 417 barcodes). They can hold a little over a kilobyte of data (about 1000+ characters). You'll find them on newer UPS shipping labels, backs of some drivers licenses, etc. I don't know of any CF 2d barcode readers, but you can find plenty that are serial-based. I'm pretty sure this is not what the post-starter was looking for, but I thought it might help someone else who is reading this post later on. 2D barcodes allow a lot more flexibility for some types of applications, although simple inventory management is still best dealt with by using UPC-style barcodes and a database frontend.
--deftech