IBM partnershipIn 1980 IBM approached Microsoft to make the BASIC interpreter for its upcoming personal computer, the IBM PC. When IBM's representatives mentioned that they needed an operating system, Gates referred them to Digital Research (DRI), makers of the widely used CP/M operating system.[27] IBM's discussions with Digital Research went poorly, and they did not reach a licensing agreement. IBM representative Jack Sams mentioned the licensing difficulties during a subsequent meeting with Gates and told him to get an acceptable operating system. A few weeks later Gates proposed using 86-DOS (QDOS), an operating system similar to CP/M and which Tim Paterson of Seattle Computer Products had made for hardware similar to the PC. Microsoft made a deal with SCP to become the exclusive licensing agent, and later the full owner, of 86-DOS. After adapting the operating system for the PC, Microsoft delivered it to IBM as PC-DOS in exchange for a one-time fee[28] Gates insisted that IBM let Microsoft keep the copyright on the operating system, because he believed that other hardware vendors would clone IBM's system.[29] They did, and the sales of MS-DOS made Microsoft a major player in the industry.[30]
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