Question: Which of the following is not output device?

Answer:

Output devices are computer components that are used to display or output data and results from the computer system. Here are some common output devices:

1. Monitor: This is the most common output device that displays text, images, and video on a screen. It can be either a CRT (cathode ray tube) monitor or a flat-panel display such as an LCD (liquid crystal display) or LED (light-emitting diode) monitor.
2. Printer: This is an output device that produces a hard copy of text and images on paper. Printers can be either inkjet, laser, or dot matrix printers.
3. Speakers: These are output devices that produce sound and music from the computer system. They are commonly used for listening to music, watching videos, and playing games.
4. Headphones: These are output devices that produce sound and music and are used for private listening. They can be either wired or wireless and can be connected to the computer through a 3.5mm jack or a USB port.
5. Projector: This is an output device that projects images and videos onto a larger screen or wall. It is commonly used for presentations, meetings, and movies.
6. Plotter: This is an output device that produces high-quality graphics and images on paper or other materials. It is commonly used for technical drawings, engineering designs, and architectural plans.
7. Touchscreen display: This is an output device that combines a monitor with a touch-sensitive screen, allowing users to interact with the computer system by touching the screen directly. They are commonly used in kiosks, ATMs, and other interactive systems.