GNU Hurd
The specification was originally created in 1995 and developed by the Free Software Foundation. GNU Hurd, VMware ESXi, Xen, and L4 microkernels all need to be booted using this method. GNU GRUB is the reference implementation used in the GNU operating system and other operating systems.  , the latest version of Multiboot specification is 0.6.96, defined in 2009. An incompatible second iteration with UEFI support, Multiboot2 specification, was later introduced. , the latest version of Multiboot2 is 2.0, defined in 2016.