* [[Desktop Environment System|DES]] (Desktop Environment System) ([[Campursoft]]) (1994)
* [[GENO]] ([[GHE]])
* [[Maxdesktop]] (Advanced Memory Systems)* [[Max desktopExcel Software]] (and [[Excel SoftwareAdvanced Memory Systems]]) (1987)
* [[Mouse Operating System (M.O.S.)]] ([[Star-Division]]) (1987)
* [[SI-BOF]] ([[Bad Error]]) (1992)