Unlike the human brain, a computer cannot generate new ideas by itself. Therefore a computer must receive information or instructions from elsewhere. You communicate with your computer through an input device. The input device is the yes or the ears of the computer due to the method that it takes in new information. A computer must have at least one input device.
Most computers have more than one input device.
Output Device . In order to convey information back to the user, a computer must have a way of talking back . The output device is the mouth of the computer, or the way it sends out information. The computer must have a place to store all of the information it processes. A storage unit can be any medium in which that information is stored.