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Posts: 70 | Thanked: 5 times | Joined on Jan 2008
I found a web-based decoder for QR Code 2-D barcodes. I took a picture of a QR Code barcode with the Camera app and uploaded it using the online form and it decoded fine. It was just a URL though. Barcodes with more info in them might require a camera with higher resolution.

Try taking a picture of this barcode and uploading it. The response should include the URL for wikipedia.