There are a multitude of barcode products available.  UPC is one type
usually used specifically for retail scanners and registers etc.  I work for
a manufacturer as a computer specialist and use barcodes quite extensively.
My preference for 'information only' barcodes is CODE39.  It literally is
just a font set you can use from any word processor and print to a laser or
inkjet printer.  Check out any of the catalog computer retailers for
relatively inexpensive barcoding products.

Ben Hanson
Information Systems MGR
Transprint USA Inc.