Dying inventor of "mouse" computer

The computing world has lost one of the most visionary inventors: Douglas "Doug" Engelbart, the man behind the "mouse" mouse, which I use every day when we sit before Proficiency.
Doug was 88 years old. He was born in Portland, Oregon, in 1925.
Studies and his work are based on concepts like Hyper, computer networks, etc., concepts without which, the way we use computers today, it would be very different.
On 21 June 1967 Engelbart wins patent for "XY position indicator for screens." Or put another way, the patent for the mouse.
A year later in 1968, the Joint Computer Conference in San Francisco, he publicly showed his invention.
Later, Xerox produced Stari, the first computer equipped with a mouse: Steve Jobs saw this project and "stole" the idea etij improved.