Bryan Ford and Erich Stefan Boleyn wrote the initial version of the Multiboot specification. The following authors assigned copyright on their work to the Free Software Foundation: In year 1999, Kunihiro Ishiguro provided the first version that would be imported into GNU GRUB. Yoshinori K. Okuji maintained it during the 1999-2006 period. In year 2000, Per Lundberg added graphics support.