The question who has invented the computer mouse is often answered like "Steve Jobs - by stealing it from Xerox". Yes Steve Jobs refined the computer mouse and made it available to an affordable price. But the man who really invented it was Douglas C. Engelbart back in the 1960s. And it was not only a pointing device. Engelbart created ideas to all relevant aspects of human machine interaction like graphical user interfaces, hypertext and computer networks.
The first computer mouse built by William English after a sketch from Engelbart