these are the slightly longer bars that stick out the bottom, and they are standard on ALL BARCODES.
Sadly, not true. Only on certain codes, like Pharmacodes and older variants. 128A-C codes don't have to have them, and neither do Code 3&9 (referred to as Code39). The starts and ends on 128 codes are designated by an asterisk and can be any length needed. There was a habit of printing the human readable text at the bottom of the barcode and encasing it with longer lines each side to fill in the space.
(dchurch bah, Sun 4 Dec 2011, 10:04, Reply)