Microsoft worked with IBM to develop DOS and I believe OS/2 as well.
os for IBM
DOS, which stands for Disk Operating System.
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:
Microsoft
Win98
He developed the operating system for IBM's personal computers. It was called MS-DOS.
Bill Gates never worked for IBM. He was the founder of Microsoft. But, Mircrosoft and IBM licensed MS-DOS for IBM's new IBM PC-AT. They then began working to develop, OS/2 a more advanced operating system. But Microsoft had different plans and IBM finished OS/2 by itself.
os for IBM
Bill Gates was the founder of Microsoft. It began as a small software company but worked with IBM at the beginning of the 1980s to develop the operating system for the IBM PC. The operating system was called "PC DOS" when supplied by IBM but Microsoft also marketed a completely compatible version known as "MS DOS". This was the operating system that was used on almost every IBM PC clone and so triggered the growth of Microsoft into the global market leader for operating systems.
DOS, which stands for Disk Operating System.
ibm
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
os/2
ibm
Microsoft
Win98