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The invention of barcodes provided a solution to this problem. Subsequently the POS system was developed, in which the price of an item of merchandise was displayed on the cash register automatically when the barcode on the item was scanned by an optical sensor, and information on the item was sent to a computer at the same time. As the use of barcodes spread, however, their limitations became apparent as well. The most prominent was the fact that a barcode can only hold 20 alphanumeric characters or so of information.
The modern-day QR Code consists of 7 parts. Each of these parts creates a sort of pixel pattern that looks similar to a crossword puzzle. Each element has a specific purpose that conveys certain information through the Code such as the print direction, timing, error tolerance, and empty spaces to differentiate the Code from what surrounds it. These days, the majority of QR Codes are scanned with a smartphone. There are tons of free apps for QR scanning for both Android and iOS devices(also with the camera). Most often, you simply open the app and it automatically scans the QR Code with the touch of a button. The uses of QR Codes surpasses the bazillion mark. Seriously. We’ve got a comprehensive guide with examples but we’ll summarize a few examples below. See additional info on orderific.com.
IBM’s first iteration of the barcode stored a 12-digit number. In 1974, code 39 barcodes were created that could store 30 alphanumeric characters. As time went on, barcode technology evolved. New types of barcodes were introduced. Each capable of storing more and more data. All of them, though, are only capable of storing around 100 characters or less. As technology developed, so did the speed of manufacturing. Parts and bits whirred down conveyor belts and sped through factories with ever-increasing speed. The time it took for a traditional UPC barcode to scan wasn’t cutting it. It was fine for grocery store checkouts in the 1970s, but it became a major bottleneck for 1990s manufacturing.