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EAN-139780747584766   EAN-13 barcode 9780747584766
Product Name101 Things You Need To Know (And Some You Don't)
LanguageEnglish
CategoryBook / Magazine / Publication
Short DescriptionPaperback
Amazon.comA Buy on Amazon ~ 0747584761
SKU237688
Price New3.08 US Dollars    (curriencies)
Price Used0.01 US Dollars    (curriencies)
Long Description101 marvellous facts, brilliantly explained: Why do we have nails? Why is the sky blue? Why can birds stand on electric wires and not be electrocuted? Educate your child with minimum effort, and in blissful peace and quiet. The perfect source of fascinating facts for any child who doesn't want to be Boring when they Grow Old.
Created11-18-2012 10:09:24pm
Modified12-23-2013 7:58:49am
MD52abd335ca251fb12757628ab7b589e1c
SHA256802d4af5c3527768fe160e992f6b67a1e3254bd4ac165a6e56a4be6598f7c472
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Article of interest

Code39 also known as Code 3 of 9 allows you to encode text using characters A-Z and 0-9 and some punctuation. Using an extended encoding system, it is possible to encode the entire ASCII character set.

barcode

Each character is made up of 10 elements where 5 are bars and 5 are spaces. You may have seen this described as 9 elements on other sites where 5 are bars and 4 are spaces but there is always a narrow space stripe between characters which means we might as well consider that trailing narrow space part of each character making the total number of elements 10. The final trailing narrow space simply appears to be absorbed into the quiet zone to the right of the final barcode. There is no check digit in this symbology unlike others. The variation between the width of the bars is what define the value of each character.

In the image below you will notice the start and stop block are the same. In most Code39 fonts,this is encoded as the asterisk (*) character although it is not displayed under the barcode. The text under the barcode is optional and is for human use only. The start and stop asterisks are not decoded when scanned and may or maynot bedisplayed. Also how the text is displayed depends on the process used to create the barcodes. Often, the text is simply under the barcode without the indent displayed in our sample.

barcode

Normally, there are only 43 characters that can be encoded using Code39. But if you want to encode the full ASCII characterset, you can prefix letters with special characters to get the characters you need including lower case and special characters. Although it is possible to encode the full ASCII set, if you actually need to do this it is better to use Code128 because it will produce a smaller barcode.

If you want to create your own Code39 barcode, you can visit our very own barcode generator page.

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