- Used to encode Global Trade Identification Numbers (GTIN).
- Contains 6 (UPC-E) or 12 (UPC-A) numerical digits.
- Last digit serves as a mod10 checksum.
- Additional data can be stored in an EAN-2 or EAN-5 add-on code.
- It has been standardised under ISO/IEC 15420.
- The first digit is always zero and can be removed on demand.
- UPC-E representation can be automatically converted to the UPC-A format.
UPC Code Variations:
- UPC-A Used on products at the point of sale
- UPC-E Used on products at the point of sale