The package DBMS_SYSTEM is installed by running the script
$ORACLE_HOME/rdbms/admin/dbmsutil.sql
This script is called by
$ORACLE_HOME/rdbms/admin/catproc.sql
By default only the SYS user can execute procedures and functions in this package. To allow other users to execute this package, run the following commands as SYS
GRANT EXECUTE ON dbms_system TO PUBLIC;
CREATE PUBLIC SYNONYM dbms_system FOR dbms_system;
In Oracle 9.2 procedures and functions include