An input device is any hardware system that delivers information with no input devices, towards the computer, a computer might just be considered a screen system and never let customers to connect to it, similar to a Television. The image is just a typical example of an input device and a Logitech trackball mouse.
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The hard disk was invented on September 13, 1956 by IBM team led by Rey Johnson (considered as “father” of the disk drive). Earlier hard disk drives were large and cumbersome devices.