Identifying Computer Output Devices

The question asks to identify an output device from the given options related to a computer system. Output devices present information from the computer to the user, while input devices allow users to send information to the computer.

Device Classification

Let's analyze each option:

• Track ball: This is an input device. It functions similarly to a mouse, allowing cursor control on the screen.
• Plotter: This is an output device. Plotters are used to draw vector graphics and print large-format documents like blueprints or charts.
• Light pen: This is an input device. It's used to interact directly with screen elements, essentially pointing or drawing on the display.
• Magnetic scanner: This is an input device. Devices like MICR (Magnetic Ink Character Recognition) readers are used to read specific characters, typically from checks.

Conclusion on Output Device

Based on the analysis, the Plotter is the only device listed that functions as an output device, presenting data visually from the computer system.