Free Idea #10 - Downloadable shopping list

Allow shoppers to download a shopping list from
a PC to a smartcard. When the card is swiped in
a device on the cart, the list will sort the
items in the order in which they are to be
found on the shelves. If items are out of stock
the device might suggest alternatives. The card
might also remember frequent purchases and flag
up a reminder should something be omitted from
the list.