Who developed the first model of the mouse?
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Who developed the first model of the trackball mouse?
Ralph Benjamin
In 1964, Bill English joined ARC, where he helped Engelbart build the first mouse prototype. They christened the device the "mouse" as early models had a cord attached to the rear part of the device which looked like a tail, and in turn resembled the common mouse. As noted above, this "mouse" was first mentioned in print in a July 1965 report, on which English was the lead author. On 9 December 1968, Engelbart publicly demonstrated the mouse at what would come to be known as The Mother of All Demos. Engelbart never received any royalties for it, as his employer SRI held the patent, which expired before the mouse became widely used in personal computers. In any event, the invention of the mouse was just a small part of Engelbart's much larger project of augmenting human intellect.
Who developed the first model of a ball mouse?
Bill English Douglas Engelbart
Computer mouse
Computer mouse
https://en.wikipedia.org/wiki/Computer%20mouse
The trackball, a related pointing device, was invented in 1946 by Ralph Benjamin as part of a post-World War II-era fire-control radar plotting system called the Comprehensive Display System (CDS). Benjamin was then working for the British Royal Navy Scientific Service. Benjamin's project used analog computers to calculate the future position of target aircraft based on several initial input points provided by a user with a joystick. Benjamin felt that a more elegant input device was needed and invented what they called a "roller ball" for this purpose.
Computer mouse
By 1963, Engelbart had already established a research lab at SRI, the Augmentation Research Center (ARC), to pursue his objective of developing both hardware and software computer technology to "augment" human intelligence.
Computer mouse
Ralph Benjamin developed the trackball, the precursor the the modern mouse, in 1946 as a  way to control user inputs in military targeting computing with a joystick His work laid the foundation for the first ball mouse prototype to be developed by Bill English in 1964, with the help of Douglas Engelbart and his Augmentation Research Center.  They christened the device the "mouse" as early models had a cord attached to the rear part of the device which looked like a tail, and in turn resembled the common mouse.