1. Day 20

2. .WAR

3. document root directory |-- WEB-INF |--classes |--lib |-- META-INF |-- manifest.mf

4. Servlets

6. new Servlet();

7. User action processing

8. HTTP GET & POST

9. GET - URL

10. POST - Binary

11. Session

12. Filters

13. Event Listeners

14. Cookies