A barcode is an optical machine-readable representation of data, which shows data
about the object to which it attaches. Originally, barcodes represented data by
varying the widths and spacings of parallel lines, and may be referred to as linear
or 1 dimensional (1D). Later they evolved into rectangles, dots, hexagons and other
geometric patterns in 2 dimensions (2D). Although 2D systems use a variety of symbols,
they are generally referred to as barcodes as well. Barcodes originally were scanned
by special–optical scanners called barcode readers, scanners and interpretive
software are available on devices including desktop printers and smartphonesBar
Code Printer.
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