Microsoft finally open sources DOS 1.0 - and it's so much more than the code

Microsoft finally open sources DOS 1.0 - and it's so much more than the code ...

Microsoft open-sources “the earliest DOS source code discovered to date”

For students of early PC history, this isn’t even the first piece of 86-DOS history that has been newly rediscovered this ...
Hackaday

An Entire RISC-V Operating System In 2000 Lines

While Microsoft and Apple don’t release the source code for their operating systems, a good estimate is that it takes around 50 million lines of code to run these software behemoths. The Linux kernel ...