Input/Output devices are essential components of a computer system that allow users to interact with the machine. Input devices, such as keyboards and mouses, enable users to enter data and commands. These devices convert user actions into signals that the computer can understand. Output devices, like monitors and printers, display or produce the results of the computer's processing. They take the information generated by the computer and present it in a form that users can comprehend, whether visually on a screen or physically on paper. Together, these devices facilitate communication between users and computers.