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by jeppesen-io 2161 days ago
Likely because the IBM PC project was a very rushed job, by IBM standards. It was built rather quickly using as much as possible off the shelf hardware and software. Due to the buacr bureaucratic nature of the company of the time, the project was largely kept from the rest of the company. That's why they outsourced DOS

When the project started, they were way way behind in the home PC market