"Persistence" (computer science)

In computer science, "persistence" refers to the characteristic of data that remains unchanged even after the program that created it has finished executing. This means the data is saved in a way that allows it to be retrieved and used later, such as in databases, files, or other storage systems. For example, when you save a document on your computer, that document's data is persistent; it stays there until you delete it, allowing you to access it anytime you want. Persistence ensures that data is reliable, accessible, and durable across different sessions or applications.