The first commercial licensing of took place in 1975 with contracts between Digital Systems and for use in their intelligent terminal, and with where… - Gary Kildall

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The first commercial licensing of took place in 1975 with contracts between Digital Systems and for use in their intelligent terminal, and with where CP/M was used to monitor programs in the Octopus network. Little attention was paid to CP/M for about a year. In my spare time, I worked to improve overall facilities... By this time, CP/M had been adapted for four different controllers.... In 1976, approached me with a problem: Imsai, Incorporated, for whom Glenn consulted, had shipped a large number of disk subsystems with a promise that an operating system would follow. I was somewhat reluctant to adapt CP/M to yet another controller, and thus the notion of a separated Basic I/O System (BIOS) evolved. In principle, the hardware dependent portions of CP/M were concentrated in the BIOS, thus allowing Glenn, or anyone else, to adapt CP/M to the Imsai equipment. Imsai was subsequently licensed to distribute CP/M version 1.3 which eventually evolved into an operating system called