# View of Data

A database system is a collection of interrelated data and a set of programs that allow users to access and modify these data. A major purpose of a database system is to provide users with an abstract view of the data. That is, the system hides certain details of how the data are stored and maintained.

* [Data Abstraction](/dbms/database/view-of-data/data-abstraction.md)
* [Schemas and Instances](/dbms/database/view-of-data/schema-and-instance.md)
* [Data Models](/dbms/database/view-of-data/data-models.md)


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