Which THREE of the following are best described as input devices for a computer?

The best description of input devices for a computer includes a scanner, mouse, and keyboard. Each of these devices serves the primary function of allowing users to provide data and control signals to the computer.

A scanner captures images or documents and converts them into a digital format that the computer can process. This makes it an essential input device for digitizing physical documents and images.

A mouse is a pointing device that enables users to interact with the graphical interface of the computer. It allows for precise control of the cursor on the screen, facilitating tasks such as clicking, dragging, and selecting items.

A keyboard inputs text, commands, and functions into the computer. It is integral for typing documents, coding, and performing various operations that require textual input.

While a printer may be associated with the output of data from a computer, it does not function as an input device; instead, it takes digital information and produces a physical copy. Therefore, the identification of the scanner, mouse, and keyboard as input devices is accurate based on their roles in data entry and interaction with the computer.