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 ”).