SQL> show user;
USER is "SYS"
SQL> select table_name from dict where table_name like '%DBA_TABLE%';

TABLE_NAME
------------------------------
DBA_TABLES
DBA_TABLESPACES
DBA_TABLESPACE_GROUPS
DBA_TABLESPACE_USAGE_METRICS

SQL> select * from DBA_TABLESPACES;
select * from DBA_TABLESPACES
              *
ERROR at line 1:
ORA-00942: table or view does not exist

SQL> select * from v$version;

BANNER
----------------------------------------------------------------
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Prod
PL/SQL Release 10.2.0.1.0 - Production
CORE    10.2.0.1.0      Production
TNS for Linux: Version 10.2.0.1.0 - Production
NLSRTL Version 10.2.0.1.0 - Production

select owner, object_name, subobject_name, object_type
from dba_objects
where object_name='DBA_TABLESPACES'
/