Identifying Non-Output Computer Devices

To answer the question, we need to differentiate between computer input and output devices.

• Output Devices: Present information from the computer to the user (e.g., display, print, sound).
• Input Devices: Send data from the user to the computer (e.g., keyboard, mouse).

Analysis of Options

Let's categorize the given computer devices:

• Printer: Used to produce a hard copy of documents. This is an output device.
• Mouse: Used to control the cursor and send commands (clicks, movement) to the computer. This is an input device.
• Headphones: Used to listen to audio output from the computer. This is an output device.
• Computer screen (Monitor): Displays visual information from the computer. This is an output device.

Conclusion

The Mouse is the only device among the options that is primarily used to send data *to* the computer, making it an input device. Therefore, it is NOT an output device.