Extended barcode which allows mail to be sorted in the order in which it is delivered on a carrier route. (USPS)
A group of small vertical bars of a specific size and height that correspond to the numeric ZIP+4 code that includes the last two numerals from the house address. This allows the Postal Service to sort letter mail in delivery sequence for the letter carrier.
A barcode formed by adding two additional numbers (normally the last two digits of the street address) to the ZIP+4 barcode.