Which of the following is NOT an input device?

The printer is classified as an output device, as it is used to produce a physical copy of documents or images generated by a computer. Output devices convert digital data from the computer into a tangible format, such as printed paper. In contrast, input devices like the keyboard, mouse, and graphics tablet are used to provide data and commands to the computer, allowing users to interact with it.

For instance, a keyboard allows users to enter text, a mouse enables navigation and selection on the screen, and a graphics tablet permits artists to create digital illustrations directly. Recognizing the distinct roles of each device helps to differentiate between input and output devices effectively.