Microsoft sold just one license under the agreement, successfully acquiring the IBM PC’s operating system for a grand total of $25,000. In February, Bob O'Rear of Microsoft got 86-DOS to boot ...

This is then paired with IBM PC DOS 5.02 (IBM's version of MS-DOS ... that lives up to the site's "retrocomputing performance art" subtitle. For a bit of context, the PCjr shipped with a ...

On Sunday, Singapore-based retrocomputing enthusiast Yeo Kheng Meng released a ChatGPT client for MS-DOS that can run on a 4.77 MHz IBM PC from 1981, providing a unique way to converse with the ...

But CP/M was priced at $240 vs. $40 for DOS (likely because of the non-royalty terms of the Microsoft contract), and it was clear that IBM was intent on pushing DOS.

Perhaps the most controversial aspect of the original IBM PC is how Microsoft ended up with the contract for the operating system. This would eventually make Microsoft's MS-DOS the standard and ...