bill english developed the first model of the trackball mouse.
bill english developed the first model of the trackball mouse.
who developed the first model of the trackball mouse?
bill english
the trackball (known as "ball tracker" at the time) was invented by ralph benjamin as part of his work for the cds in 1946. the prototype, named "roller ball", was patented in 1947, but kept as a secret inside the military. it laid the foundation to input devices such as the computer mouse. production units used a joystick in place of the trackball.









































section::::history.









































section::::history.:initial work.
comprehensive display system
as with modern mice, most trackballs now have an auxiliary device primarily intended for scrolling. some have a scroll wheel like most mice, but the most common type is a “scroll ring” which is spun around the ball. kensington's slimblade trackball similarly tracks the ball itself in three dimensions for scrolling.









































in september 2017 logitech announced release of mx-ergo mouse, which was released after 6 years of its last trackball mouse.









































section::::special applications.
trackball