What is an I/O device?

An I/O (input/output) device serves the critical function of facilitating interaction between the user and the computer system. This encompasses a variety of devices that allow users to input data into the computer and receive output from it. For example, input devices include keyboards and mice, which enable users to enter commands and data, while output devices such as monitors and printers deliver information designed for user consumption. This definition underscores the role of I/O devices in establishing a bridge between human interaction and computer operations, making it essential for effective computing.

By contrast, the other options describe different elements of a computer system. Internal components processing data refers to the CPU and other parts like RAM, which perform calculations and execute commands but do not interact directly with users. A type of software that enhances system performance is typically related to system utilities or specific applications, not I/O devices. Finally, storage media focus on long-term data retention, such as hard drives or SSDs, which serve to store data rather than handle the input or output functions. Thus, "a device that facilitates interaction with the computer" accurately captures the essence of what constitutes an I/O device.