Cookies are used on some pages of the DG website. A cookie is a text file received from the web server containing information of each visitor to the site, and is stored on a hard disk. Cookies are assigned to each user, and can be read only by the web server in the domain that sent the cookie to a web browser. A cookie notifies the web server when a specific user visits the same web page and through which web browser. In this way, when a user accesses the same page on DG's website on the same web browser, the web server reads the past cookie data through the web browser. A cookie can save time when a visitor is entering data, etc. A visitor may disable the cookie settings from the web browser. However, if cookies are disabled, all of DG's services may not be fully available.