Computer Scientist Gary Kildall created just such an operating system in 1974 for a small computer called the ”Intellec-8ó that Intel had designed to showcase their new microprocessors. Called ”CP/M”, it was unlike most other operating systems for small computers because it was written in PL/M, a portable higher-level language that he had designed earlier, rather than in the assembly-language of a particular computer. That meant that CP/M could be ported to run on many different personal computers. And if the applications were written in PL/M, they could be ported as well.

» David Laws | computerhistory.org


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