A cookie is a piece of text that a Web server can
store on a user's hard disk. Cookies allow a Web site to store
information on a user's machine and later retrieve it. The pieces of
information are stored as name-value pairs.
Microsoft Internet Explorer (IE) stores cookies in different files
on your hard disk drive. The more you browse the web, the more
cookies are stored on your PC. Each cookie has its own lifetime -
from several seconds to several years. However, IE does not remove
expired cookies from your PC even if they are expired and will be
never used. Therefore, your hard drive can store several hundreds or
even thousands unused and useless files.