On the sign-in page, click the "Forgot your username and password?" link. You will be prompted to enter the email address you would have used to register for TED.com. Click on the Submit button. If you have registered with us, your username and a new, temporary password will be sent to your email address. If you haven't registered with us, the system will give you an error message, saying it doesn't recognize your email address. In that case, we invite you to register now. (It's fast and free!)
Note: If you have attended a TED conference in the past, you are already a member, but may still need to transfer your account to our new system. Please contact us and let us know you would like your registration information. We will send you instructions for logging in or establishing a new account.