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 ...
TechNewsWorld

UPDATE: Longhorn Exposed at Windows Developer Conference

Hoping to steer its next-generation Windows operating system — code-named Longhorn — into the developer community, Microsoft has released previews of the software. The actual Longhorn operating system ...
Neowin

A quick look back at BeOS, the PC operating system that tried to challenge Windows and Mac

In 1995, another PC operating system launched its first version around the same time as Windows 95 was released. It was called BeOS, and it tried to become an alternative to Windows and Mac. Last week ...