Ashton-Tate's Framework on a green Hercules was my daily driver for a very long time. Multi-tasking (sort of), windows, and the ability to cut-and-paste between applications in a text-only environment years before Microsoft Windows was usable.
Framework was the tits back in the day. It was basically Emacs for the office. It built on the core concept of a frame the way Emacs built on the buffer -- except frames could contain other frames, which is how Framework composed spreadsheets and documents with multiple subsections.
Like Emacs, Framework was programmable in a Lisp-like scripting language called FRED. In fact you could attach FRED macros to any frame, and they would be saved along with your work.
All this on an 8088-based PC (or 80186-based Tandy 2000).
https://en.wikipedia.org/wiki/Framework_(office_suite)
Picture: https://winworldpc.com/res/img/spotlight/Famework%201.0%20-%...