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2. Universal Product Code - Wikipedia

   en.wikipedia.org/wiki/Universal_Product_Code

   A UPC barcode. The Universal Product Code (UPC or UPC code) is a barcode symbology that is used worldwide for tracking trade items in stores.. The chosen symbology has bars (or spaces) of exactly 1, 2, 3, or 4 units wide each; each decimal digit to be encoded consists of two bars and two spaces chosen to have a total width of 7 units, in both an "even" and an "odd" parity form, which enables ...

3. Barcode - Wikipedia

   en.wikipedia.org/wiki/Barcode

   A barcode or bar code is a method of representing data in a visual, machine-readable form. Initially, barcodes represented data by varying the widths, spacings and sizes of parallel lines. Initially, barcodes represented data by varying the widths, spacings and sizes of parallel lines.

4. Code 128 - Wikipedia

   en.wikipedia.org/wiki/Code_128

   Python Bar Code 128 – This code appears to draw boxes one pixel wide. It appears it was modified from a short line long line bar code which would have drawn lines. The "Black boxes" should be the same size as the "White Boxes". GenCode128 – Free C# source code implementation of Code128. Almost all features are implemented, but is not 100% ...

5. Tracking number - Wikipedia

   en.wikipedia.org/wiki/Tracking_number

   Tracking numbers are useful for knowing the location of time sensitive deliveries. It is a unique ID number or code assigned to a package or parcel. The tracking number is typically printed on the shipping label as a bar code that can be scanned by anyone with a bar code reader or smartphone.

6. International Article Number - Wikipedia

   en.wikipedia.org/wiki/International_Article_Number

   These barcodes only represent the digits 0–9, unlike some other barcode symbologies which can represent additional characters. The most commonly used EAN standard is the thirteen-digit EAN-13 , a superset of the original 12-digit Universal Product Code (UPC-A) standard developed in 1970 by George J. Laurer . [ 1 ]

7. GS1 - Wikipedia

   en.wikipedia.org/wiki/GS1

   In the UK alone, the introduction of the barcode in the retail industry has resulted in savings of 10.5 billion pounds per year. [1] [9] Some of the barcodes that GS1 developed and manages are: EAN/UPC (used mainly on consumer goods), GS1 Data Matrix (used mainly on healthcare products), GS1-128, GS1 DataBar, and GS1 QR Code.