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английский) 3:
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Einframe is a general purpose, large general purpose computer. The original host was used to process a lot of information. The largest host manufacturer is IBM. The characteristics of Minicomputer are very reliable, high speed, and the capacity of information input and output device is very large. Thousands of terminal or user microcomputers can be connected. The largest companies, government agencies, banks use mainframe. With the development of microcomputers and minicomputer systems, the value of mainframe has declined. Host costs are relatively high: a package of computers is estimated to be at least $million. Nevertheless, they have been actively used in the areas of Finance and defence, accounting for 20 to 30 per cent of the total number of computers. Because of the low cost of using hosts to centrally store and process large amounts of information, Than maintaining distributed data processing systems, including thousands of personal computers.<br>
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