Input devices of a computer

When unprocessed data is sent to the computer with the help of input devices, the data is processed and sent to output devices. The input devices may be hand-operated or automated. The act of processing is mainly regulated by the CPU. Some examples of hand-operated input devices are:

Overlay keyboard
Trackball
Joystick
Digital camera
Microphone
Touchscreen
Digital video
Image scanner
Graphics tablet
Computer keyboard
Mouse