...which in turn was strongly influenced by a previous product from DEC. "Various aspects of CP/M were influenced by the TOPS-10 operating system of the DECsys

...which in turn was strongly influenced by a previous product from DEC. "Various aspects of CP/M were influenced by the TOPS-10 operating system of the DECsystem-10 mainframe computer, which Kildall had used as a development environment." https://en.m.wikipedia.org/wiki/CP/M https://en.m.wikipedia.org/wiki/CP/M