Multiple choice

What was progenitor of MS-DOS?

  1. 86-DOS

  2. 80-DOS

  3. CP/M-80

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

MS-DOS was based on 86-DOS (also known as QDOS), which Microsoft purchased from Seattle Computer Products in 1981. CP/M-80 was an earlier operating system that inspired its design.

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