||NigDOS 2.24||1988||?||||7|| Link Required
|-
||[[ParaDOS|ParaDOS]]||?||[[Executioner|Executioner]]||||7or smaller|| Link Required
|-
||[[RDOS|RDOS]]||?||[[Dobbertin|Dobbertin]]||||7smaller than any other installed DOS|| Link Required
|-
||[[RODOS|RoDOS v2.11]]||19xx||Romantic Robot||||7|| Link Required
||[[ROMDOS|Rom DOS XL v4.88]]||1993||[[Siren_Software|Siren Software Ltd]]||||7|| Link Required
|-
||[[VDOS|VDOS]]||?||[[Vortex|Vortex]]||||7or smaller|| Link Required
|-
||[[XD-DOS|XD-DOS]]||1987||?||||7or smaller|| Link Required
|-
|Alternative OS ROMs|||||||||||
||CPM Accessory ROM 1||1988||Graduate Software||||-|| Link Required
|-
||Vorax's CPM Plus ROMby Vorax||19xx||Graduate - Vorax||||-|| Link Required
|-
||[[FutureOS|FutureOS]]||2011||[[FutureSoft|FutureSoft]]||||-fixed numbers|| Link Required
|-
||[[Symbos|SymbOS]]||?||[[Prodatron|Prodatron]]||||-|| Link Required