barcode scanner
Quick Summary
A barcode is a printed series of parallel bars or lines of varying width used to enter data into a computer system. These bars represent binary digits (0s and 1s), which can form numbers that a digital computer processes. The numbers represented by the barcode are also printed below it.1
A barcode scanner, often a laser scanner, reads this information. This can be a handheld device or a scanner built into surfaces like checkout counters. When the scanner passes over the code, or the code passes over the scanner, the computer stores or processes the data. This technology, introduced in the 1970s, is widely used in retail for inventory and pricing, assigning unique codes to products for efficient transaction processing.12
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barcodeThe numbers represented by a barcode are also printed out at its base.
Read MoreThe numbers represented by a barcode are also printed out at its base.
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computer scienceSocial and professional issues…most checkout counters include a bar-code scanner, which reads into the computer the Universal Product Code (UPC) printed on each package. Cash register receipts then include brief descriptions of the items purchased (by fetching them from the computer database), and the purchase information is also relayed back to the computer…
Read More…most checkout counters include a bar-code scanner, which reads into the computer the Universal Product Code (UPC) printed on each package. Cash register receipts then include brief descriptions of the items purchased (by fetching them from the computer database), and the purchase information is also relayed back to the computer…
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