Sign out of Gmail from any Computer

If you ever check your Gmail from another computer, and think you may have forgotten to sign out, you can sign out from any device. Log into your Gmail on an available computer. Scroll all the way to the bottom of your inbox. In the bottom right, you will see the following:

                                        Last account activity: 9 minutes ago                                                                           Details

Click on Details.
This will open another box which will give you the option to Sign out of all other sessions if you have any open.