Other versions of CP/M were also available:
* [[Vortex_CPM|Vortex ] also shipped their CP/M with their disc drives and their hard disk. This utilised their memory expansion and supported their disc format (which was widely used)* [Dobbertin_CPM|Dobbertin ] shipped CP/M to be used with their hard disk.
* [[Graduate Software]] provided a version of CP/M+ on ROM.
Various utilities also patched CP/M to use extended disc formats and to support Amstrad peripherals.
* [[DkTronics_Patched_CPM]]
CP/M versions relating to the Amstrad CPC