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16:10, 1 September 2006 == Disc operating systems ==
* [[400K/S]] ([[SD Microsystems]])
* [[AMSDOS]] ([[Amstrad]])
* [[AMSDOS#BASDOS|BASDOS]]
* [[MS800]] ([[Microstyle]])
* [[ParaDOS]] ([[Quantum Computing]])
* [[RODOS]] ([[Romantic Robot]])
* [[ROMDOS]] and [[RAMDOS]] ([[KDS]]/[[Siren Software]])
* [[S-DOS]] ([[STS]])
* [[Vortex Computersysteme|VDOS]] ([[Vortex Computersysteme]])
== Graphical user interfaces / Shells ==
* [[CEUS Desktop 2.0]] ([[Prodatron]])
* [[Desk-Royal]] ([[Crusader Software]])
* [[Desktop]] ([[DW Software]])
* [[Desktop Environment System|DES]] (Desktop Environment System) ([[Campursoft]])
* [[GENO]] ([[GHE]])
* [[Mouse Operating System (M.O.S.)]] ([[Star-Division]]) (1987)
* [[SI-BOF]] ([[Bad Error]]) (1992)
* [[Stream2]] ([[Advanced Software Project]])
== Filesystem Utilities ==
* [[Cataclysme]] ([[GPA]])
* [[COPY]] (Antoine)
* [[CopyLuck]] (CBl)
* [[Crime]] ([[Crown]])
* [[DirDoktor]] (GPA)
* [[Discology]] (Méridien lnformatique) (1986)
* [[DiscOMagic]] ([[Joker]])
* [[DiskDeDumper]] ([[Prodatron]])
* [[DiskDoktor]] (GPA)
* [[DOS Copy]] ([[Face Hugger]])
* [[JL-Copier]] ([[JLCS]])
* [[LameCopy]] (GPA)
* [[MagicDOS]] ([[Longshot]])
* [[MarkError]] (GPA)
* [[MultiMark]] (GPA)
* [[Oddjob]]
* [[ReadDSK]], [[WriteDSK]] ([[Targhan]])
* [[SpeedFormat]]
* [[SymCommander]] ([[Prodatron]])
* [[Xexor]] ([[Executioner]])
== Operating Systems ==
* [[Contiki]]
* [[CP/M]]
* [[CP/M#MicroDOS|MicroDOS]]
* [[FutureOS]]
* [[SymbOS]] ([[Prodatron]] / [[SymbiosiS]])