| Data Abstraction |
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| | Once
defined, we can create lists without |
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| worrying
about how the data is stored |
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| | We
hide the data structure used for the |
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| data
within the data type -- so it is |
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| transparent
to the program using the data |
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| type |
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| | We
call the program using this new data |
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| type:
the client program (or client) |
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