Some older versions have been released as open-source software over the past few years, giving us a better look at early computing history, and now the code for the 1988 release of MS-DOS 4.0 is ...

That said, readers with sufficiently gray beards may recall that DOS 4.0 wasn’t particularly well ... s arguably the least popular version of MS-DOS in this way, but then again there’s ...

In partnership with IBM, Microsoft has released the source code for MS-DOS 4.0, more than 35 years since the operating system made a muted appearance ahead of Windows 3.x.… MS-DOS 4.0 is a relic ...

Microsoft has announced that it is open sourcing MS-DOS 4.0, in collaboration with IBM, who developed portions of the code. It will be available under the MIT license. This came about because an ...

Even in 2025 there are still many applications for a simple Disk Operating System (DOS), whether this includes running legacy ...

To get the answer, just put a decimal point in the number "50"—my first Microsoft product was MS-DOS 5.0.