Later two-dimensional (2D) codes were developed, using rectangles, dots, hexagons and other geometric patterns in two dimensions, usually called barcodes although they do not use bars as such.īarcodes originally were scanned by special optical scanners called barcode readers. Later applications software became available for devices that could read images, such as smartphones with cameras. Fast-selling items can be identified quickly and automatically reordered.Slow-selling items can be identified, preventing inventory build-up.The effects of merchandising changes can be monitored, allowing fast-moving, more profitable items to occupy the best space.Historical data can be used to predict seasonal fluctuations very accurately.Items may be repriced on the shelf to reflect both sale prices and price increases.This technology also enables the profiling of individual consumers, typically through a voluntary registration of discount cards.Instantly create custom barcodes or QR codes using this free online barcode and QR code generator. While pitched as a benefit to the consumer, this practice is considered to be potentially dangerous by privacy advocates. Choose from common linear barcode symbologies including UPC, EAN, Code 128, and Code 39. Each code is readable by either a 1D or 2D barcode scanner. Select a barcode symbology, or 'type.' The default is the most common Code 128.
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