http://www.ubuntu.com/desktop/get-ubuntu/download: This page has
specific information and links for downloading, burning, and installing
the current release of the Ubuntu Desktop edition. Replace desktop in the
URL with server to download Ubuntu Server
http://www.ubuntu.com/project/about-ubuntu/derivatives: This page has
information about Ubuntu derivatives, or flavors. These are based on
Ubuntu but are modified to include different software or interfaces
http://www.gnu.org/software/grub/: This is the home page for the GRUB boot
loader