We have all done it!
While visiting a friend or working on a public computer, you have taken a few minutes out of your day to check your Facebook News Feed, update your status or post a quick pic. Arriving home you realize you did not log out of your Facebook account. Rest assured, before a prankster friend takes over your account and changes your relationship status (or worse) you can access your Security Settings to review a list of devices and browsers that you have recently used.
Simply select the "offending" device and log out! Sleep better knowing your status updates are your own!