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Very little helps: Tesco serves up 3-for-1 borkage special to self-scanning Tesco shoppers • The Register
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A Bar Code Scanner in a Holder on a Supermarket Trolley in a Tesco Store in the UK Editorial Stock Photo - Image of market, quick: 200764433
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Tesco supermarket shopper using handheld "scan as you shop" device to record items purchased Stock Photo - Alamy
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