The plastic credit cards that millions of people use every day have at least one feature in common: in technological terms, they are all dumb. Soon, however, many people will be carrying "smart" cards equipped with tiny electronic brains similar to those now found in everything from cars to computers. French scientists have developed a card containing a microchip that can store at least 100 times as much data as the magnetic strips on standard charge plates.
The new cards can hold information ranging from the amount of credit a consumer has left to any medicines to which he might be...
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