* [[AMSDOS]] ([[Amstrad]])
* [[AMSDOS#BASDOS|BASDOS]]
* [[MagicDOS]] ([[Logon System]])
* [[MS800]] ([[Microstyle]])
* [[ParaDOS]] ([[Quantum Computing]])
* [[ROMDOS]] and [[RAMDOS]] ([[KDS]]/[[Siren Software]])
* [[S-DOS]] ([[STS]])
* [[SymDOS]] ([[Flynn]])
* [[Vortex Computersysteme|VDOS]] ([[Vortex Computersysteme]])
* [[MagicDOS]] ([[Logon System]])
== Graphical user interfaces / Shells ==
* [[FutureOS]]
* [[SymbOS]] ([[Prodatron]] / [[SymbiosiS]])
* [[SymDOS]] ([[Flynn]])