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# Application developers and database administrators-These are the people that design and build a database-based application that uses the DBMS.

The latter group members design the needed database and maintain it.

The first group members write the needed application programs which the application comprises.

Both are well familiar with the DBMS product and use its user interfaces ( as well as usually other tools ) for their work.

Sometimes the application itself is packaged and sold as a separate product, which may include the DBMS inside ( see embedded database ; subject to proper DBMS licensing ), or sold separately as an add-on to the DBMS.