Implicit objects in JSP

1) out
- print variable,
- PrintWriter object, to send output to client.

2) request
- scope,
- access request data by request.getParameter().
- HttpServletReequest object
- ServletRequest object for non-Http servlets

3) response
- set status codes/ response headers.
- HttpServletResponse object

4) session
- scope,
- access session data & existing session.
- created automatically

5) application
- scope,
- is ServletContext,
- = getServletConfig().getContext(),
- data is shared between all servlets.
- getAttribute(), setAttribute() for placing application level data.

6) page
- synonym for this,
- rarely used.

7) pageContext
- access page variables.

8) config
- servlet config object for this page.