What functionality do output devices provide in a computer system?

Output devices are essential components of a computer system that serve the crucial role of communicating results from the computer to the user. This includes displaying information visibly through monitors, playing audio through speakers, or producing hard copies via printers. The primary purpose of these devices is to take processed data from the computer and translate it into a form that is understandable and usable by individuals.

This functionality is distinct from other options provided. Storing information permanently is the role of storage devices, which retain data even when the computer is turned off. User interaction with software typically involves input devices, such as keyboards and mice, enabling users to send commands or data into the system. Controlling power to other devices is not a function of output devices but may involve power management systems or devices specifically designed for energy control. Thus, the ability of output devices to effectively convey information to users is vital for the operation and usability of a computer system.