When you use multiple computer to check your G-mails or when you use a public place like cafeterias or Internet clubs you might forget sign out your Gmail account... But, don't worry! Now, you can sign out your Gmail account from a remote area of the computer you're sign in.
But, unfortunately, this feature is not available in every account by now. However, you might would like to be informed. Maybe it's coming soon. (Read the full story by clicking on the title)