Oracle 11g Release 1 and Release 2 Data Dictionary Views

Views Area:

DB Creation
Users and Resources
RMAN Recovery Catlog (RMAN - Recovery Manager)
TBS Management (TBS - Tablespace)
Roles and Privileges
Control Files
Storage Parameters
Auditing
Rollback Segments
Data Pump
Dispatchers
Redo Log Files
Archived Redo Log Files
Security
Undo Management
Tuning