AM I the only old guy that reads this????????????
IBM, in October of 1980, was on the hunt for an OS for their new "PC" yet to be introduced, sent a team to talk to MS about getting an OS for them to use. Bill Gates and Paul Allen had started Microsoft to market BASIC. They actually had no OS and were not initially interested in writing an OS and Bill recommended that they seek out Gary Kildall, who had CP/M-86, (Gary and Dorthy Kildall were starting up Digital Research) of Digital Research in Calif. The team went to DR and there were some problems, Gary was not there and they met with Dorthy.....anyway they traveled back to MS and again wanted to know if they could interest MS in writing an OS. Bill and Paul agreed to provide an OS.
Microsoft had no 8086 real operating system to sell, but quickly made a deal to license "Seattle Computer Products'" 86-DOS operating system, which had been written by Tim Paterson for use on that company's line of 8086, S100 bus micros. 86-DOS (also called QDOS, for Quick and Dirty Operating System) had been written as a 16-bit version of CP/M, since Digital Research was showing no hurry in introducing CP/M-86. Paterson's DOS 1.0 was approximately 4000 lines of assembler source.
This code was polished up by MS and Petrson and presented to IBM for evaluation. IBM found itself left with Microsoft's offering of "Microsoft Disk Operating System 1.0". An agreement was reached between the two, and IBM agreed to accept 86-DOS as the operating system for their new PC (Bill also licensed BASIC). Microsoft purchased full rights to 86-DOS in July 1981 for a rumored, $50,000.00, and well as you know today the rest is history.
Most of this is from a PBS story about GEEKS and from actual interview statements made by Gates and a little from my failing memory.
So in summation, while MS (Gates) tried to steer IBM in the right direction once, he did not pass this up the second time and as a result of Corp leanings toward IBM as substantial, the PC began appearing on desk tops. The original PC actually was not able to accomplish much, and sales were meager even with IBM Marketing behind them. It wasn't until a killer application appeared that the need for a PC was even thought of as something that could provide any added value. If you have not guessed what that killer application was yet ........remember LOTUS 123, yes this automated spreadsheet application allowed the many individuals in companies to analyze data at will (these tasks were already accomplished manually with ???paper and pen) The accountants, engineers, scientists, and many other diciplines all began to be able to enter data and move it around at will and then they could leave their french curves in their desks as they could plot and graph the same data.
It was this explosion in use that catalpulted the sales of the PC and along with each PC a copy of "IBM/MS DOS". I guess it is more or less a thing of being in the right place at the right time...luck??? this was only the basis/means for MicroSoft to build upon.
rvnguy