Microsoft was selected as the vendor
os for IBM
DOS, which stands for Disk Operating System.
Bill Gates and Microsoft initially partnered with IBM in 1980 when IBM was developing its first personal computer. Rather than providing their own operating system, Gates suggested that IBM license an operating system from another company. Microsoft then purchased and modified an existing OS, QDOS, to create MS-DOS, which IBM adopted for its PC. This decision marked a significant turning point, allowing Microsoft to retain control over its software while enabling IBM to enter the personal computer market.
ibm
Oh, dude, like, Bill Gates didn't really talk anyone into letting him create their operating system. He and Paul Allen actually created their own operating system called MS-DOS, which they licensed to IBM. So, it's more like they were the cool kids creating their own thing and IBM wanted in on the action.
The original operating system for an IBM PC with Intel Processor was DOS (disk operating system) which operated at a command level prompt of C:
windows NT
hi
Microsoft
ibm
Win98
os/2