Penguin
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A boot loader is the first software program that runs when a computer starts. It is responsible for loading and transferring control to the OperatingSystem Kernel.

A multiboot loader offers a menu and the ability to select from a list of operating systems.

Multiboot loaders include:

  • GRUB
  • LILO
  • Windows' NT Bootloader (NTLDR)

You can chain bootloaders, so for example, grub can then call Windows' bootloader (this is the preferred method for DualBooting Linux and Windows.)