This means that they can, in theory at least, still run MS-DOS. The venerable Microsoft 16-bit OS may now be long discontinued, but there is still enough need for DOS that the open-source FreeDOS ...

A Quick Look At The 30-Year History Of MS DOS By Dylan Love Jul 27, 2011, 2:01 PM PT Dylan Love That iconic black screen and blinking cursor are no longer in active use, but they're hardly forgotten.

The world of MS-DOS-compatible operating systems moves slowly enough that most of this information is still relevant; FreeDOS was at version 1.1 back in 2014, and it’s on version 1.3 now.