The PCjs project has a great Windows 1.0 emulator you can use in your browser. It runs on Javascript, and all you have to do to use it is just click in the windows to take control of the Windows ...

Microsoft releases version 1.0 of the open-source Windows Terminal application following a year of development.

But Windows 1.0 was marketed as an upgrade for people already running MS-DOS — and, in fact, it ran on top of MS-DOS, so anybody who wanted Windows had to have MS-DOS installed first.

And recently he discovered a never-before-seen secret in Windows 1.0 RTM (the RTM stands for “ release to manufacturing ”).