DBMS is also known as the database management system. It is one of the oldest components of a computer. DBMS is software designed to manage all database systems that are installed on the hard drive or network of a computer. The are several components of DBMS. They are DBMS engine, data definition subsystem, data manipulation subsystem, application generation subsystem, and data administration
. subsystem. Check out this link for more information on components of DBMS: http://www.wisegeek.com/what-is-dbms.htm.