We just open-sourced DOS 4 (and found binaries of Multitasking DOS 4) https://www.hanselman.com/blog/open-sourcing-dos-4
Open Sourcing DOS 4

See the canonical version of this blog post at the Microsoft Open Source Blog! ...

@shanselman Tagging @eniko who was just hoping on an open sourced qbasic

@Tedspence @shanselman lol that post was inspired by this one actually but I didn't wanna bug anyone by sending them an @

(Please open source qbasic though it would mean so much to me)

@eniko @shanselman Woops! Sorry!!