Following are the available implicit objects in EL :
* header : It is used to map request header name to the single value
* cookie : It is used to cookie name to the cookie value
* param : It is used to map parameters to a single value.
* pageScope : It is used to map values from the page scope.
* pageContext : It provides access to Object requests, session
* sessionScope : It is used to map values from the session scope.
* requestScope : It is used to map values from the request scope. Attributes are set by request implicit object.
* applicationScope : It is used to map values from the application scope.
* headerValues : It is used to map the request header name to the single values
* initParam : It is used to map the Initialization Parameter
* paramValues : It is used to map the request parameter to an array of values
