represent a series of thick and thin vertical linesreadable by computerized optical scanners that represent numbers used to track products.

Bar codes

Explanation:

A barcode is a way of representing data in a machine-readable and visual form. In the past, barcodes illustrated data by placing the parallel lines at intervals and altering the widths. Nowadays, barcodes known as one-dimensional (1D) or linear are scanned by optical scanners. Also, the two-dimensional (2D) barcodes were manufactured using dots, rectangles, hexagons and some geometric patterns, known as matrix barcodes. Barcodes are used for the tracking of products.

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