GRUB stand for Grand Unified Botloader. it is a more advanced and flexible boot loader than the traditional utility, LILO, or Linux Loader. Many distributions still support LILO, but Fedora Core does not

the most common place for the boot loader to size is on the Master Boot Record (MBR). that is the default method. you can also place it on the first hard disk sector of the / or /boot partition if you wish to use a boot loader from another operating system.