Passwords are like bubble gum; they are much better when used by only one person. If you share your computer with others, each person should have a unique account, username, and password. Don't allow another user to know or use your password, and don't ask another user if you can use theirs. When it's your turn to use the computer, log the last user off, and log on using your own username and password. When you take a break, don't leave your computer open. Log off or lock it. And remember: Passwords shorter then 8 characters are easy to crack; avoid common words and proper names; and use both uppercase and lowercase letters, numbers, and symbols.