Hi, SPrime and gp123
Thanks for your very helpful advice.
Now I know how to uninstall applications from my N7.
I just want to know do these uninstall methods delete all the uninstalled application files including data files and temporary cache? In the Windows world, there are some "Clean Uninstaller" applications to help you remove all unneeded files from your PCs hard drive when you uninstall a program. I want to know do I have to find one clean uninstaller app for my N7.