Various levels of detail of a Macro photograph I took of a square barcode off the packaging of our new toaster. In fact, it's a variety of barcode I haven't seen before. It's not a QR code, as it's missing the position and alignment points and isn't a regimented grid like the Semacode also is.
Either way, it's a beautiful thing. Data for computers to read that - when zoomed in - look like a map or an old engraving, each ink dot like a tiny brush-stroke penned by a machine that only a machine can fully appreciate.
Also the pattern on the left looks like a representation of the spirals of a spiral-bound notebook.
Expect to see the aforementioned QR codes all over Australia in the very near future for data-dumps onto your mobile.