Personal computers use touchscreens.
 Some examples of output devices are:Computer monitorPrinterPC speakerProjectorSound cardVideo card=== Control unit ===The control unit (often called a control system or central controller) manages the computer's various components; it reads and interprets (decodes) the program instructions, transforming them into control signals that activate other parts of the computer
 The ability to store and execute lists of instructions called programs makes computers extremely versatile, distinguishing them from calculators

