Editing Banknote (section)

==Vending machines and banknotes==

In the late 20th century, [[vending machines]] were designed to recognize banknotes of smaller values long after they were designed to recognize coins distinct from slugs.{{where|date=October 2021}} This capability has become inescapable in economies where inflation has not been followed by introduction of progressively larger coin denominations (such as the United States, where several attempts to make [[dollar coin (United States)|dollar coins]] popular in general circulation have largely failed). The existing infrastructure of such machines presents one of the difficulties in changing the design of these banknotes to make them less counterfeitable, that is, by adding additional features so easily discernible by people that they would immediately reject banknotes of inferior quality, for every machine in the country would have to be updated.{{cn|date=October 2021}}