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Despite this, they are used extensively in finance and defense complex, where they hold from 20 to 30 per cent of computer Park, so as to use mainframes for centralized storage and processing of quite a large amount of information is cheaper than maintaining distributed data processing systems consisting of hundreds and thousands of personal computers.Supercomputers are needed for applications that require performance, at least in the hundreds of billions of operations per second. Such huge amounts of computations needed to meet the challenges in aerodynamics, meteorology, high-energy physics, geophysics. Supercomputers are used and in the financial field when processing large volumes of transactions on the stock exchanges. They are distinguished by high cost — from fifteen million dollars, so the decision to purchase such machines are often taken at the State level, developed system of trading second-hand supercomputers
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