Bill English (computer engineer)

Building the mouse. English, Engelbart's chief engineer, turned his sketch into the first working mouse in 1964, a wooden box with two wheels, and engineered the cameras, links and screens that made the 1968 demonstration possible. He moved to Xerox PARC in 1971, where his team replaced the wheels with a rolling ball, the design used by most mice for the next thirty years. He died in 2020.