What is a Barcode?
A barcode (also spelled bar code) is a method of representing data in a visual, machine-readable form.
Barcode is a machine-readable code in the form of numbers and a pattern of parallel lines of varying widths, printed on a commodity. Hence a barcode essentially is a way to encode information in a visual pattern that a machine can read.
Barcodes became commercially successful when they were used to automate supermarket checkout systems, a task for which they have become almost universal. Their use has spread to many other tasks that are generically referred to as automatic identification and data capture (AIDC).
There are two types of barcodes: linear – or 1D, and 2D. The first six numbers of the barcode is the manufacturer's identification number. The next five digits represent the item's number.
The last number is called a check digit which enables the scanner to determine if the barcode was scanned correctly.
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