| Operating Systems |
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| • | Large,
complex programs |
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| • | Typically |
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| – | Long-lived |
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| – | Frequently
extended and updated |
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| – | Worked
on by a number of developers |
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| – | Used
and, maybe abused by a variety of users with |
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| varying
expertise and expectations |
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| • | Essential
to create an acceptable computing |
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| environment
to create and execute other programs |
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| that
achieve business or personal goals |
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