Google: Remote sign out:
When you get home, after subbing at a branch, you realize that you forgot to sign out of your Google account. Anyone using the reference desk computer could read your email, etc.. Don’t panic! On any computer, log in to your Gmail account. At the bottom right corner of your Inbox screen there is a link which says “details”. Click on this – and then click on “Sign out all other web sessions” button. This will sign you out of your Google account at any other computers you may have been using.