Editing Multiuser DOS (section)

===Adaptations===

===={{anchor|CCP/M-86 with Windows}}Concurrent CP/M-86 with Windows====
In February 1984 Digital Research also offered a version of Concurrent CP/M-86 with windowing capabilities named '''Concurrent CP/M with Windows for the IBM Personal Computer and Personal Computer XT'''.<ref name="CCPM_1984"/>

===={{anchor|CCP/M-86/80}}Concurrent CP/M-86/80====
{{See also|CP/M-86/80|CP/M 8-16|MP/M 8-16}}
This was an adaptation of Concurrent CP/M-86 for the LSI-M4, LSI Octopus<ref name="LSI_Octopus"/> and CAL PC computers. These machines had both 16-bit and 8-bit processors, because in the early days of 16-bit personal computing, 8-bit software was more available and often ran faster than the corresponding 16-bit software. Concurrent CP/M-86/80 allowed users to run both CP/M (8-bit) and CP/M-86 (16-bit) applications. When a command was entered, the operating system ran the corresponding application on either the 8-bit or the 16-bit processor, depending on whether the executable file had a [[.COM (file extension)|.COM]] or [[CMD file (CP/M)|.CMD]] extension. It emulated a CP/M environment for 8-bit programs by translating CP/M [[system call]]s into CP/M-86 system calls, which were then executed by the 16-bit processor.<ref name="Kildall_1982_8-bit"/>