Windows 10 users on the Windows Insiders Fast Ring should see this in the "next few months". Windows Terminal 1.0 is available from the Microsoft Store and the GitHub releases page.

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

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.