Search notes:

$ORACLE_HOME/rdbms/admin/catalog.sql

catalog.sql creates basic catalog views. Specifically, tasks of catalog.sql include

create the data dictionary views and base tables
create the dynamic performance views
create public synonyms for above
grant public access to these synonyms

The file must be run when connected as SYSDBA, after creating a database.

See also

catpcat.sql runs catalog.sql and catproc.sql in parallel.

$ORACLE_HOME/rdbms/admin/dbmspool.sql enables DBA to lock PL/SQL packages, SQL statements, and triggers into the Shared Pool.

$ORACLE_HOME/rdbms/admin