Default Objects in jsp page [ Liferay ]

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There are some default objects in jsp page we are using in liferay apart from the actual default objects of liferay. But unfortunately we don't know how many default objects providing by liferay.
After little investigation I came to know all the default objects which are providing by liferay.

There are two taglibs which we are including every time when we create portlet.

Portlet tag lib

The above statements will give 14 default objects :

1. actionRequest
2. actionResponse
3. eventRequest
4. eventResponse
5. portletConfig
6. portletName
7. portletPreferences
8. portletPreferencesValues
9. portletSession
10. portletSessionScope
11. renderRequest
12. renderResponse
13. resourceRequest
14. resourceResponse

And the type of each object as follows :

liferay-theme tag lib

The above statements will give 18 default objects :

1. themeDisplay
2. company
3. account
4. user
5. realUser
6. contact
7. layout
8. layouts
9. plid
10. layoutTypePortlet
11. scopeGroupId
12. permissionChecker
13. locale
14. timeZone
15. theme
16. colorScheme
17. portletDisplay
18. portletGroupId

and the type of each object as follows :
We can get these defaults objects using pageContext object which is default of the plain jsp. Below statement is the example for getting default objects.

ActionRequest actionRequest = (ActionRequest) pageContext.findAttribute(“actionRequest”);