I break down how barcodes work and the information they reveal about products. Man who 'ejected' friend and girlfriend from car at 124 mph after hitting parked tractor-trailer is sentenced Iran live: ...

A 2D (two-dimensional) barcode is a graphical image that stores information horizontally as one-dimensional barcodes do, as well as vertically. As a result, the storage capacity for 2D barcodes is ...