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EAN-139780974106007   EAN-13 barcode 9780974106007
Product NameSammy the Seal (I Can Read Level 1)
LanguageEnglish
CategoryBook / Magazine / Publication
Amazon.comA Buy on Amazon ~ 0064442705
SKU9780064442701
Price New0.01 US Dollars    (curriencies)
Price Used0.01 US Dollars    (curriencies)
Width0.19 inches    (convert)
Height9 inches    (convert)
Length6 inches    (convert)
Weight4 ounces    (convert)
AuthorSyd Hoff
Page Count64
BindingPaperback
Published01/05/2000
FeaturesGreat product!
Long DescriptionA seal at school! What happens when Sammy, the adventurous seal, leaves the zoo for the day? He goes to the city, finds a school full of kids and new things to do -- and he even learns to read!
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Modified05-01-2020 6:13:50am
MD571c3dc653cc8e5edc8079e57539f25bf
SHA2563d0de975e6d27c3087a629407ea2665051de2c7ecac24d0ddc66b9985d005c20
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Article of interest

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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