CBSE Class 9 Computer Applications
Question 22 of 72
Input and Output Devices — Question 5
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Question Question 5
Explain the functions and usage of a bar code reader.
A barcode reader is an input device that scans barcodes and decodes the information they contain. A bar code is a combination of dark and light stripes. It is a computer readable representation of information, present in visual format. A bar code reader consists of a light source, a lens, and a light sensor for translating the optical impulses into electrical signals.
Barcode readers are used for a variety of purposes such as :
- Tracking inventory
- Processing transactions
- Asset tracking
- Package tracking
- Time and attendance
- Software upgrades