cookie
A cookie is data created by an internet server while browsing a website that is sent to a web browser. The browser stores the information in a text file, and re-sends that information to the server each time the browser accesses the server. The main purpose of a cookie is to help the server identify the browser. Websites may use cookies to identify and track users, update user preferences, or to save users previously entered information; such as names, addresses, or passwords.