It was eventually purchased by Microsoft to equip the “secret” project of the original IBM PC.

The Microsoft software empire was built on the venerable command prompt, but everything started with 86-DOS.

Basic commands of the MS-DOS shell such as dir, copy and format are available as well.

The oldest release of MS-DOS precursor 86-DOS is now available for download

Both products were essentially the same system.

But the prompt can still be useful formany advanced trickseven in the Windows 10/11 era.