Onee upon a time, the fastest supercom- puters were top-secret. In the days of the cold war, the best US machines were reserved primarily for the use of spy agencies and designers of nuclear weapons. But now, the Pentagon's crack research agency is funding the development of machines that, it hopes, will be shared by industry and university scientists, as well as by spies and weapons designers. That way, it figures, more people will write code to harness the computers' massive power — and the cost and effort of - developing applications will tumble.
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