Tomodachi OS

Tomodachi OS is a software family made in 1989 by TomoMii Services, it is a software designed for entertainment purposes. It was the first OS series to be ever made by Mii Characters. They also made the OSs WiiMe and Mii Computer.

TomoOS (1987-2009)
TomoOS was the first to be released of Tomodachi OS. It discontinued in 2009.

TomoOS 91 (1991-Still Works!)
TomoOS 91 released in 1991 and for some reason it still works.