The beginning of 10 great inventions

computer mouse

In the mid-1940s, while serving in the British Royal Navy, Professor Ralph Benjamin invented a device that worked like a computer mouse with a trackball and supported a radar planning system for fire control systems.

After various adjustments and improvements, it presented the “Roller Ball” to the public, a product that works like a standard mouse, equipped with an external ball acting on the mouse and two rubber-coated wheels. Inside