Sometimes users do login from any unfamiliar computer/cyber cafe & forget to log out or any computer failure occurs. You must not bother about it as you can log out from all other computers without using that computer again. Follow these steps:
- Login to your facebook.
- Go to Account> Account Setting> Under Setting tab> Account Security. There you will see something as shown below only if your facebook account is opened from other location otherwise you will see only recent login information.
- Click on end activity will log out from all other computers.