In the context of computers (desktop, laptop or on-board vehicles), non-volatile refers to computer memory. It means that if data is stored in non-volatile memory, it will remain intact, even if power is removed from the unit. When the power is restored, the data still exists in the memory and can still be read, displayed or retrieved by the sytem.

Data stored in volatile memory is lost the instant power is removed. In this case, the data can never be retrieved. An example of volatile memory is computer RAM.

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