UPC-A
Universal Product Code
The UPC-A barcode symbology is used for identification of retail goods at point of sale inside of the US. It usually carries a GTIN-12.

Also Known as
UPC, UCC-12, Universal Product Code.
Variants:
- UPC-A+2 is an extension of UPC-A that includes a two-digit add-on.
- UPC-A+5 is an extension of UPC-A that includes a five-digit add-on.
- UPC-E is a barcode symbology derived from UPC-A that is designed for small packaging.
- UPC-A CompositeGS1 composite is a variant of UPC-A that should be used when a CC-A or CC-B 2D component is required.
- A UPC-A symbol can be converted to an EAN-13 symbol by prefixing the GTIN-12 with 0 to make the equivalent GTIN-13.
Standards:ISO/IEC 15420, BS EN 797, GS1 General Specifications.
Example
1.Identical symbols, input provided with a check digit:

Data: 788581014974
2.A symbol that includes a five-digit add-on:

Data: 788581014974 54499