jsp EL memento

(this is a memento extract from http://download.oracle.com/javaee/1.4/tutorial/doc/JSPIntro7.html)
The JSP expression language defines a set of implicit objects:

• pageContext: The context for the JSP page. Provides access to various objects including:

• servletContext: The context for the JSP page’s servlet and any web components contained in the same application.
• session: The session object for the client.
• request: The request triggering the execution of the JSP page.
• response: The response returned by the JSP page.

In addition, several implicit objects are available that allow easy access to the following objects:

• param: Maps a request parameter name to a single value
• paramValues: Maps a request parameter name to an array of values
• header: Maps a request header name to a single value
• headerValues: Maps a request header name to an array of values
• cookie: Maps a cookie name to a single cookie
• initParam: Maps a context initialization parameter name to a single value

Finally, there are objects that allow access to the various scoped variables

• pageScope: Maps page-scoped variable names to their values
• requestScope: Maps request-scoped variable names to their values
• sessionScope: Maps session-scoped variable names to their values
• applicationScope: Maps application-scoped variable names to their values