You can log in to Classmates no matter what computer you're using. You'll just need your password and either your registration number or the email address associated with your membership.
If you're sharing a computer, you might see a message that someone else is logged in. You'll need to log that person out first by clicking Sign Out under the gear icon at the top of any Classmates.com page. Choose a sign out option and then sign in to your own account.
If you've forgotten or misplaced your password, click Forgot? on the login page and follow the prompts. We'll send you an email with a link to reset your password.