 internal structure of the database is good.
Recovery usually means that any completed transactions are checked, and
any lost changes are reapplied to the database.  At the end of the
recovery process, applications can use the database as if there had been
no interruption in service.</p>
        <p>Finally, there are a number of data management services that permit
copying of data. For example, most database systems are able to import
data from other sources, and to export it for use elsewhere.  Also, most
