23 After World War II, many a returning serviceman or woman was keen to continue eating exoticfoods tasted in different parts of the world during the hostilities. This led to the 'international aisle'and an expansion in the range of foods supermarkets offered. (23) . In the 1960s, the firsttrading stamps appeared. These were given to the shopper once they had spent a certain amountof money. Stuck into a special book, the stamps could be exchanged for a discount on futurepurchases. With the coming of scanning technology a few decades after, this trend became theloyalty card.
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