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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 ...
Then in 1987 it was standardized as JIS-X-0502, [2] a standard physical distribution barcode symbol ITF-14/16/6. The ITF barcode has an add-on version for displaying the weight, etc., and it is possible to encode a 5-digits numerical value and 6-th check character as ITF-6 [ 3 ] after ITF-14 or ITF-16 [ 4 ] (obsolete in 2010).
C1, C3: Start/end marker. C2: Marker for the center of the barcode. 6 digits in the left group: 003994. 6 digits in the right group (the last digit is the check digit): 155486. A digit is encoded in seven areas, by two black bars and two white spaces. Each black bar or white space can have a width between 1 and 4 areas.
The structure of the barcode is based on the checksum. In order to compute the checksum, multiply each of the digits by either 3 or 9, alternating each time. Then add them and then do a mod 10. So the checksum for 05415 MN is 1 based on the following calculations: 0*3=0 5*9=45 4*3=12 1*9=9 5*3=15 ----- 81 % 10 = 1
The numbers are summed together. For example, the number 6 is encoded NWWNN, with wide bars occupying the positions for 2 and 4 (2+4=6). In the case of NNWWN which is 4+7 = 11 it is assigned to 0 for digits (+0), and 10 for the letter columns (+10 – +30). When encoding the (+10 to +30) letters the equation needs a "−1" added so 'A' is WNNNW ...
I2/5 on a 135 film can; part of DX encoding. On 135 film (35 mm) canisters, interleaved 2 of 5 is used to identify the manufacturer, the film type, number of exposures and proprietary information using 6 digits. The barcode is located between the electrically read silver and black DX Camera Auto-Sensing Code and the film can exit lip. It is ...
However, using the same codes is not mandated by law, so please note it may not be the exact same code at every store every time. To date, there are 1500 PLU codes in use, the IFPS explained.
They do not appear in the body of a Codabar string. The 16 possible combinations of start and stop symbol may be used to distinguish different applications. For example, the library barcode illustrated begins with A and ends with B. FedEx tracking number barcodes, on the other hand, begin with B and end with D.