How to Apply for a UPC Number. A universal product code consists of a unique set of numbers that identify a product. GSI, the only authorized dealer of UPCs in the United States, indicates that a ...

How to Read Numbers on UPC Barcodes. Barcode technology makes real-time data collection possible. Despite the multitude of barcodes in existence today, universal product codes remain among the ...

Dear Umbra, I recently learned that the UPC numbers on produce indicate whether the item is conventionally grown (beginning with a 4), organically grown (beginning with a 9), or genetically ...