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| Multiprogrammed Batch |
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| Systems |
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| ä | I/O
operations are exceedingly slow |
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| (compared
to instruction execution) |
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| ä | A
program containing even a very small |
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| number
of I/O ops, will spend most of its |
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| time
waiting for them |
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| ä | Hence:
poor CPU usage when only one |
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| program
is present in memory |
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