CanonCat (1987) / Jef Raskin
(https://oldcomputers.net/canon-cat.html)
A computer system with text-based interface and some ideosyncratic tweaks developed by Raskin aimed at high efficiency and convenience. He elaborates on his approach in his “Humane Interface” book. Most notably the LEAP function, a way to quickly navigate around documents, that also introduced the dedicated LEAP buttons on the CanonCat’s keyboard.