[Coco] Zork 1,2 and 3, and 6502 MS Basic are now open source

[John Guin]

Hoping 6809 Basic will be next.

https://opensource.microsoft.com/blog/author/scott-hanselman

And MS-DOS 4 as well, if I read this correctly.  As I look at Scott's page, the timestamps are only minutes old...

John