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EAN-130025192123924   EAN-13 barcode 0025192123924
UPC-A025192123924   UPC-A barcode 025192123924
Product NameAndromeda Strain
CategoryElectronics / Photography: A/V Media
Short DescriptionDVD
Amazon.comA Buy on Amazon ~ B00008438U
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Created07-01-2006
Modified06-06-2019 10:05:32pm
MD5d15ca79e23dafb6b8d8e9af3e831e31a
SHA2561cba0287a0781f7650846c6df30fa8899d9bf9d2db235449f0039129d53b43dc
Search Googleby EAN or by Title
Query Time0.0007579

Code 128 is a high-density 1D barcode symbology. This barcode set makes use of the entire 128 ASCII characters which include letter, number and symbols.

Code 128 Barcode

As with all barcodes, there are indicators to identify where the barcode starts and stops. These are marked in yellow below. Code 128 also has a check character which has been marked in green. The remainder of the barcode is the data being encoded. The text below the barcode is optional and is for human consumption in the event the barcode can't be scanned or if people also need to know what the code means.

Code 128 Barcode

Each character in the barcode symbol is composed of three bars and three spaces. Each bar or space must range from 1-4 units and the sum of all the width of all bars must work out to an even number. The stop marker is special because it adds an extra bar of 2 units at the very end (4 bars and 3 spaces). There are three different start markers to to identify which code set is being used. To represent all 128 characters, the code sets can be within a single barcode as needed by using control characters 98-101 (depending on the code set).

The check character is calculated by summing the value of each character and multiplying it by its position. The start character is also part of the sum but is added without weight (multiply by 1 just like the first encoded data character) then when you have the sum take the modulo 103 remainder. This gets a little more complex when mixing modes within a single barcode.

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