Free software and 2-D barcodes
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You've probably seen them: black and white checkerboard-patterned matrices printed on labels and other real-world objects that you can optically scan with a cameraphone or other handheld device to extract an encoded message. But although 2-D barcodes (as they are known) are getting more common, working with them is still a bumpy road for the Linux and free software crowd. Fortunately, several options exist for reading and generating them with open source software.
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