Amiga

And the end result included a GUI where most window, widget, and even full screen moving and switching operations all worked faster than eye. Microsoft and Apple wouldn't deliver that for decades, if ever.

I wrote all my papers in high school and my first two years of college on an Amiga 500. It connected to the internet service on campus and allowed me to keep my course work organized in the Workbench in both high school and college. It was a great system for getting work done, plus I could play my games. I ended up having to get a Windows / DOS computer for the rest of college, though, because stuff stopped being compatible for printing in the computer lab.