Barcode
Introduction:
A barcode (also bar code) is a machine-readable representation of information in a visual format on a surface. Originally barcodes stored data in the widths and spacings of printed parallel lines, but today they also come in patterns of dots, concentric circles, and hidden in images. Barcodes can be read by optical scanners called barcode readers or scanned from an image by special software. Barcodes are widely used to implement Auto ID Data Capture (AIDC) systems that improve the speed and accuracy of computer data entry.
While traditionally, barcodes encoding schemes represented just numbers, newer symbologies add new characters such as from the upper case alphabet to the complete ASCII character set and beyond. The drive to encode ever more information in combination with the space requirements of simple barcodes led to the development of matrix codes (a type of 2D barcode), which do not consist of bars but rather a grid of square cells. Stacked barcodes are a compromise between true 2D barcodes and linear codes, and are formed by taking a traditional linear symbology and placing it in an envelope that allows multiple rows.
This booklet is to help you understand bar codes so that you can better plan for your bar coding applications. The use of bar coding has been growing dramatically over the last 15 years. With the adoption of UPC as the standard for retail grocery stores in the late 70's, bar codes have become an everyday experience for most people. Bar codes are a fast, easy, and accurate data entry method. The correct use of bar codes can decrease employee time required and increase an organization's efficiency.
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