Persistence (computer science)
Characteristic of state of a computer system that outlives the process that created it / From Wikipedia, the free encyclopedia
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This article is about state outliving processes. For immutable data structures, see Persistent data structure. For concepts relating to the persistence of memory, see The Persistence of Memory (disambiguation).
In computer science, persistence refers to the characteristic of state of a system that outlives (persists more than) the process that created it. This is achieved in practice by storing the state as data in computer data storage. Programs have to transfer data to and from storage devices and have to provide mappings from the native programming-language data structures to the storage device data structures.[1][2]
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Picture editing programs or word processors, for example, achieve state persistence by saving their documents to files.