Which one is better?Session or Cookies?

Dear everyone, I want to know which approach is bettter?Using cookies or session to store user's data? i have tried using cookies ,but some computers can't accept that,then i move to session register,but my supervisor ask me to put cookies as well, i dunno what is the purpose of using cookies instead i can use session. can anyone help me to answer why have to use cookies?and for what? cause i know that some user doesn't want to enable cookies thank you very much Hendry Sumilo _________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com.