Add-on Symbols (barcodes) can be used in some applications together with the EAN-13, UPC-A, and UPC-E barcodes. Add-on Symbols may contain 2 or 5 additional digits and are usually placed to the right of the barcode.
Valid symbols: |
0123456789 |
Length: |
fixed, 2 or 5 characters |
Check digit: |
no |
The "UPC-E" barcode with the "02" Add-On Symbols
The "EAN-13" barcode with the "00321" Add-on Symbols