A barcode is a visual machine-readable representation of data, which shows certain data on certain products. Initially, barcodes represented data in the widths (lines) and the spacings of parallel lines, and may be referred to as linear or 1D barcodes or symbologies. They also come in patterns of squares, hexagons, dots, and other geometric patterns within images termed 2D matrix codes or symbologies. Although 2D systems use symbols other than bars, they are generally referred to as barcodes as well. Barcodes can be read by optical scanners called barcode readers, or scanned from an image by special software.
Barcodes are machine-readable symbols used to store bits of data. Barcodes are used for identification, tracking, inventory, and as part of retail point of sale (POS) systems. Barcodes are used everywhere in the modern world and are there if you look for them.
Everyday you see bar codes in the world around you. You see them in supermarkets, on labels, greeting cards and fresh goods. By now you also realize that bar codes have replaced the conventional pricing of products.
Bar codes can be used in every business around the world.