Complex sentence: In computer science, persistence refers to the characteristic of data that outlives the execution of the program that created it: which is achieved in practice by storing the data in non-volatile storage such as a file system or a relational database or an object database.
Split into simpler sentences: In computer science, persistence refers to the characteristic of data that outlives the execution of the program that created it. This is achieved in practice by storing the data in non-volatile storage such as a file system or a relational database or an object database.