If you are under 13 years of age, you are not authorized to register to use the Site.</p> <p> <strong>Member Account, Password and Security</strong>: You are responsible for maintaining the confidentiality of your password and account, if any, and are fully responsible for any and all activities that occur under your password or account. You agree to (a) immediately notify Y Combinator of any unauthorized use of your password or account or any other breach of security, and (b) ensure that you exit from your account at the end of each session when accessing the Site.