Input units have been formed by the user into the processor input device, such as a keyboard, mouse, joystick, light pen, touch screens and barcode scanner.
The unit has a function to receive input from the user into processing unit input devices such as keyboard, mouse, joystick, touch screen, light pen, scanner and a barcode reader.
The input unit is formed from the user to the processor functions for input devices such as the keyboard, mouse, joystick, touch screen and light pen scanner bar code reader