However, the team found that eventually both methods of memory retrieval were as effective in the tasks, meaning that while sleep deprivation affects brain function it does not affect overt behaviour, as previously thought.

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But for information that needs to be stored and retrieved fast, flash memory offers businesses far greater retrieval speed at a much lower cost.

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In developing early data processing systems, the high cost of memory and storage led to a premium being placed on the efficiency of application data access and retrieval.

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