UPC-A
Product IdentificationAlso known as: GTIN-12
Ethan Carter
QR & Barcode Standards Specialist
UPC-A is the 12-digit retail barcode (a GTIN-12) used mainly in the United States and Canada.
How it works
It encodes a number-system digit, manufacturer and product codes and a check digit, and is essentially a subset of EAN-13 with a leading zero.
Where it's used
The standard checkout barcode across North American retail.