This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
I don't know the exact table name, but you should either search google for "Oracle meta data tables" or just use a graphical viewer to see the full list of system tables in the database. I believe the user tables start with "user_"