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2. Plessey Code - Wikipedia

   en.wikipedia.org/wiki/Plessey_Code

   A Plessey Code Barcode Label. Plessey Code is a 1D linear barcode symbology based on pulse-width modulation, developed in 1971 by The Plessey Company plc, a British-based company. [1] It is one of the first barcode symbology, and is still used rarely in some libraries and for shelf tags in retail stores, in part as a solution to their internal ...

3. MaxiCode - Wikipedia

   en.wikipedia.org/wiki/MaxiCode

   MaxiCode is a public domain, machine-readable symbol system originally created by the United Parcel Service (UPS) in 1992. [1] Suitable for tracking and managing the shipment of packages, it resembles an Aztec Code or QR code, but uses dots arranged in a hexagonal grid instead of square grid. MaxiCode has been standardised under ISO/IEC 16023. [2]

4. 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 ...

5. High Capacity Color Barcode - Wikipedia

   en.wikipedia.org/wiki/High_Capacity_Color_Barcode

   An example of a High Capacity Color Barcode: a Microsoft Tag referring to the HCCB article on the English Wikipedia. High Capacity Color Barcode (HCCB) is a technology developed by Microsoft for encoding data in a 2D "barcode" using clusters of colored triangles instead of the square pixels conventionally associated with 2D barcodes or QR codes. [1]

6. Interleaved 2 of 5 - Wikipedia

   en.wikipedia.org/wiki/Interleaved_2_of_5

   The wide lines form a two-out-of-five code with consecutive values of 1, 2, 4, 7, and 0, where the code 0 is assigned to the value of 11. This is similar to the POSTNET bar code. Digits 01 23 45 67 89 encoded in ITF: a = quiet zones; ST = start code nnnn; 0 = nnWWn (bars) 1 = WnnnW (spaces) 2 = nWnnW (bars) 3 = WWnnn (spaces) 4 = nnWnW (bars) 5 ...

7. Here’s What Those Colored Circles on Food Packages Actually Mean

   www.aol.com/those-colored-circles-food-packages...

   But there’s something else printed on the back of most food packaging: several brightly-colored circles or squares that look like some sort of secret code. However, these shapes aren’t an ...