An input device is any peripheral (piece of computer hardware equipment) used to provide data and control signals to an information processing system (such as a computer ). Input and output devices make up the hardware interface between a computer as a scanner or 6DOF controller.
EXAMPLES OF INPUT DEVICES
In computing, a process is an instance of a computer program , consisting of one or more threads , that is being sequentially executed  by a computer system that has the ability to run several computer programs concurrently .
An output device is any piece of computer hardware equipment used to communicate the results of data processing carried out by the information processing system (such as computer) to the outside world
A storage device is a device used for storing something. Examples: