Cookies
A cookie is a small data file that certain Web sites write to your hard drive when you visit them. A cookie file can contain information, such as a user ID, that the site uses to match with the registration information you've already given to us. But the only personal information a cookie can contain is information you supply yourself. A cookie can't read data off your hard disk or read cookie files created by other sites.

Registration
When you register, this site uses a cookie to store a unique user ID. We use this user ID to identify you in our database, which enables you to enter and use the site without having to register each time.