A POS terminal provided in accordance with the present invention receives the items in a purchase. Typically, each item will have a bar code that is scanned by a bar code scanner, and the POS terminal in turn receives, from the bar code scanner, signals representative of the items. The POS terminal then...http://www.google.co.uk/patents/US20020046124?utm_source=gb-gplus-sharePatent US20020046124 - Method and apparatus for providing a supplementary product sale at a point-of-sale terminal
