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.