CP/M

[Control Program/Monitor; later {retcon}ned to Control Program for Microcomputers] An early microcomputer {OS} written by hacker Gary Kildall for 8080- and Z80-based machines, very popular in the late 1970s but virtually wiped out by MS-DOS after the release of the IBM PC in 1981. Legend has it that Kildall's company blew its chance to write the OS for the IBM PC because Kildall decided to spend a day IBM's reps wanted to meet with him enjoying the perfect flying weather in his private plane (another variant has it that Gary's wife was much more interested in packing her suitcases for an upcoming vacation than in clinching a deal with IBM). Many of CP/M's features and conventions strongly resemble those of early {DEC} operating systems such as {TOPS-10}, OS/8, RSTS, and RSX-11. See {MS-DOS}, {operating system}.

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