A database is a rational, coherent, and well-organized compilation of data that can be gathered, controlled, and changed with ease. Databases, often known as electronic databases, are designed to allow for the production efficiency, insertion, and modification of data and are saved as a file or set of files on magnetic discs, tapes, and other secondary storage. Objects (tables) make up the majority of a database, while records and fields make up tables. Fields are the fundamental units of data storage, containing data about a specific element or attribute of the entity defined by the database. The data is extracted from the database using a database management system (DBMS).