hiii
do you mean implicit objects??? if so then,
there are 7 implicit objects available in JSP,
Object Name Object Type
1. application javax.servlet.ServletContext
2. config javax.servlet.ServletConfig
3. exception java.lang.throwable
4. out javax.servlet.jsp.JspWriter
5. pageContext javax.servlet.jsp.PageContext
6. request javax.servlet.HttpServletRequest
7. response javax.servlet.HttpServletResponse
7. session javax.servet.http.HttpSession
i hope this helps you.
if still in doubt please revert back..
Thanks
Amit