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…showed last 75 words of 637 total…Gates and Allen like everything else, took this particular job seriously and were determined to produce a quality product, and they did just that. They developed what is called MS-DOS, or Microsoft Disk Operating System. IBM was very pleased and they quickly incorporated it into all their personal computers. From there Microsoft grew rapidly in popularity and in production. By 1986 Microsoft was a globally recognized company, and Mr. Bill Gates was a 31 year old Billionaire.