QR Code Scanner Classification: Input Device

A QR Code Scanner's primary function is to capture visual information (the QR code) and convert it into digital data that a computer can understand.

• Input Device Definition: Devices that send data or control signals to a computer system are classified as input devices. Examples include keyboards, mice, and scanners.
• QR Code Scanner Function: It reads the pattern of a QR code using a camera or sensor and transmits this information (like a URL or text) to a connected device (e.g., smartphone, computer).
• Conclusion: Since the QR Code Scanner sends data *to* the computer, it functions as an Input Device.

Why Other Options Are Incorrect

• Output Device: These devices display or present data *from* the computer (e.g., monitor, printer). A QR scanner does not display computer output.
• Storage Device: These devices hold data for later retrieval (e.g., hard drive, USB drive). A QR scanner primarily captures and transmits data, not stores it long-term.
• Processing Device: This is typically the CPU, which executes instructions and processes data. A QR scanner captures data but doesn't process it in the computational sense.