Developed by: Digital Research, Inc. / Gary Kildall
Launched: 1974

It was an operating system created by Gary Kildall of Digital Research, Inc. for computers with 8080 CPUs. Becoming the most popular operating system among personal computers in the 1970s.

The last version for 8-bit computers was CP/M-3, which included the Amstrad PCW, the Amstrad CPC, the ZX Spectrum +3, the Commodore 128, and the MSX.
In the 1980s, a version of CP/M-86 was created for the Intel 8086 and 8088 microprocessors. Later versions (DOS Plus) adopted MS-DOS commands and eventually became compatible with it, known as DR-DOS.

CP/M versions

Year	Ver.
1973	CP/M 1.0
1975	CP/M 1.1
1976	CP/M 1.3
1978	CP/M 1.4
1979	CP/M 2.0
1981	CP/M-86 1.0Adaptation of the CP/M operating system to IBM PC computers with 16-bit Intel 8086 microprocessors.
1982	CP/M-68KThe port for the 16-bit Motorola 68000 microprocessors.
1982	CP/M-8000The port for the 16-bit Zilog Z8000 microprocessors.
1982	CP/M 2.2
1983	CP/M 3.0 or CP/M PLUS
1983	CP/M-86 1.1Added hard drive support.