4/22/2023 0 Comments Pc dos 7.1 boot disk![]() ![]() Over the history of IBM PC DOS, various versions were developed by IBM and Microsoft. IBM's expectation proved correct: one survey found that 96.3% of PCs were ordered with the US$40 PC DOS compared to 3.4% with the US$240 CP/M-86. Īlthough IBM expected that most customers would use PC DOS, the IBM PC also supported CP/M-86, which became available six months after PC DOS, and UCSD p-System operating systems. Negotiations continued over the months that followed, and the paperwork was officially signed in early November. IBM first contacted Microsoft to look the company over in July 1980. We went to Microsoft on the proposition that we wanted this to be their product. We had lost a series of suits on this, and so we didn't want to have a product which was clearly someone else's product worked on by IBM people. It could be horribly expensive for us to have our programmers look at code that belonged to someone else because they would then come back and say we stole it and made all this money. We had a terrible problem being sued by people claiming we had stolen their stuff. According to task force member Jack Sams: ![]() IBM wanted Microsoft to retain ownership of whatever software it developed, and wanted nothing to do with helping Microsoft, other than making suggestions from afar. ![]() Microsoft, founded five years earlier by Bill Gates, was eventually selected for the operating system. This radical break from company tradition of in-house development was one of the key decisions that made the IBM PC an industry standard. The IBM task force assembled to develop the PC decided that critical components of the machine, including the operating system, would come from outside vendors. ![]()
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