Difference between Server and System Administrators

Hi!
I was just wondering that what is the difference between Server
Administrator and System Administrator roles in SQL server. Can you
please guide me with the list of the tasks that one can do and other
cannot.
Thanks in advanceLookup "serveradmin fixed server role" in BooksOnLine.
Andrew J. Kelly SQL MVP
<sajid_yusuf@.yahoo.com> wrote in message
news:1126285490.756823.272090@.g44g2000cwa.googlegroups.com...
> Hi!
> I was just wondering that what is the difference between Server
> Administrator and System Administrator roles in SQL server. Can you
> please guide me with the list of the tasks that one can do and other
> cannot.
> Thanks in advance
>sql