XDA Developers on MSN

The virtual OS museum lets you relive the glory days of Windows 3.1, DOS, PalmOS, and more

This is a real operating system blast from the past.
Ars Technica

Though “barely an operating system,” DOS still matters (to some people)

Earlier this month, I spent a day working in the throwback world of DOS. More specifically, it was FreeDOS version 1.1, the open source version of the long-defunct Microsoft MS-DOS operating system.