The good ones were 2.11, 3.x (mainly 3.20 and 3.30), MS-DOS 5.0a, MS-DOS 6 (mainly 6.20 which was being removed quickly). While MS-DOS 4 wasn’t as bad as press may have made it (IFS was cool ...

This isn't the first time Microsoft has open-sourced MS-DOS, as its GitHub repository already has versions 1.25 and 2.0, which were originally shared at the Computer History Museum back in 2014.

DR-DOS version numbers had started off mimicking MS-DOS version numbers to show that the former would work just like the latter. But there was no DR-DOS 4.0. Instead, Digital Research named its ...

It’s a piece of common knowledge, that MS-DOS wasn’t capable of multitasking. For that, the Microsoft-based PC user would have to wait for the 80386, and usable versions of Windows. But… ...

Microsoft already released MS-DOS 1.25 and 2.0 in 2014, in cooperation with The Computer History Museum. [Link: Microsoft open-sources infamously weird, RAM-hungry MS-DOS 4.00 release ...

MS-DOS 4.0 has now become part of this shared history. Ten years after releasing the source code of MS-DOS 1.25 and 2.0, Microsoft is making yet another contribution to the world of open-source ...

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 ...

30 years ago today, Microsoft bought the rights to the Quick and Dirty OS, re-branded it as MS-DOS, struck a deal with IBM, and made history.

Microsoft earlier today, in collaboration with IBM, announced that it is open-sourcing the MS-DOS 4.00 source code. The company has explained what was special about it and how to run it.

That’s part of the reason that both companies have released the source code for certain versions, including MS-DOS 1.25, 2.11, and as of now, 4.0.