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"Recall that the main idea is... implementations of the same abstraction can be substituted freely."

— Barbara Liskov

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Data abstractions provide the same benefits as procedures, but for data. Recall that the main idea is to separate what an abstraction is from how it is implemented so that implementations of the same abstraction can be substituted freely.

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Quote text and notes from Wikiquote: Barbara Liskov (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.