System Tables Views Oracle PLSQL

SQL>
SQL> create table t(
  2    a int
  3  );
Table created.
SQL>
SQL>
SQL> select table_name, tablespace_name
  2    from user_tables
  3   where table_name = 'T';
TABLE_NAME                     TABLESPACE_NAME
------------------------------ ------------------------------
T                              SYSTEM
SQL>
SQL> drop table t;
Table dropped.
SQL>