Question
Which is recognized as an input device? a. A cathode ray tube b. An inkjet printer c. An organic light-emitting diode d. A barcode reader
Ask by Davison Chavez. in the United States
Jan 23,2025
Real Tutor Solution
Tutor-Verified Answer
Answer
A barcode reader is an input device.
Solution
The correct answer is:
**d. A barcode reader**
**Explanation:**
- **a. Cathode Ray Tube (CRT):** This is an output device used in older types of computer monitors and televisions to display images.
- **b. Inkjet Printer:** This is also an output device, used to print documents and images from a computer.
- **c. Organic Light-Emitting Diode (OLED):** This technology is used in displays for screens, making it an output device.
- **d. Barcode Reader:** This is an input device. It scans barcodes and inputs the data into a computer system for processing.
**Therefore, a barcode reader is recognized as an input device.**
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Did you know that barcode readers originally emerged in the 1940s but didn’t gain popularity until the 1970s? The first successful scan of a UPC barcode occurred in 1974 at a supermarket in Ohio, revolutionizing retail checkouts and inventory management forever! In practical terms, barcode readers are everywhere nowadays, from grocery stores to warehouses, enhancing efficiency and accuracy in tracking products. They can scan multiple items in a second, making checkout lines way shorter and shopping a lot more efficient. Isn't technology amazing?
