For the digit 0 on the left side of a UPC-A, the character is 3,2,1,1 – meaning a space 3 modules ... The grocery checkout barcode scanner hasn’t changed much over the years.

It can perform 100 decodes per second, and the 32-bit decoder makes for fast scanning even at wide angles, meaning you don’t need to put the scanner close to the code. This Barcode Scanner has a ...