UPC-E is a smaller version of the 7-digit UPC symbolology of number system 0. UPC-E barcodes usually specify 6 digits and the barcode calculates the 7th check digit. UPC-E can only be used to write a 12-digit identification code that starts at 0 and contains a sequence of 4 or 5 zeros in a particular position (see General EAN.UCC Specifications for more information). reference). According to the rules of the specification, the 12-digit code is converted to an 8-digit code and written to the barcode. In Stimulsoft Reports, this location has been simplified. The 8-digit code must be submitted as data and the check digit will not be checked.

In front of the middle guard bar, the binary 1 is a bar and 0 is a space. However, the pattern is optically inverted at the guard bar in the middle row. That is, 1 is a space and 0 is a bar. The basic structure is the same as the UPC-A barcode.

A"UPC-E" barcode.