A computer system is made up of four main types of components - input devices,output devices,secondary storage devices and processor. Elements/components of a computer system In computing, an input device is a piece of computer hardware equipment used to provide data and control signals to an information processing system such as a computer or information appliance. Examples of input devices include keyboards, mouse, scanners, digital cameras, joysticks, and microphones. Digital Camera Duplex Combo Scanner Joystick Keyboard Microphone Mouse An output device is any piece of computer hardware equipment which converts information into human-readable form. It can be text, graphics, tactile, audio, and video. Some of the output devices are Visual Display Units (VDU) i.e. a Monitor, Printer, Graphic Output devices , Plotters, Speakers etc. Monitor Plotter Printer Speaker ...