Hi Terry,
I like your retro videos, and I hope that you will also do some on those software that were the heyday 3 or 4 decades ago, like Visicalc, 123, Wordstar, Dbase etc. I recommend you try out Ashton Tates' Framework II(or III or IV) that runs on top of MSDOS and has a user interface similar to Windows, way before Windows came onto the scene.

Best regards
Albert