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Old 23rd Jun 2012, 12:32 pm   #10
jjl
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Join Date: Jan 2003
Location: Ware, Herts. UK.
Posts: 914
Default Re: Digital hard copy?

Indeed, 2D barcodes such as the QR codes that seem to be appearing everywhere can encode several kilobytes of data in a small printed area. See here

http://en.wikipedia.org/wiki/QR_code

John
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