@antonia My kids recently refered to an EAN-9 barcode as a QR code, because they simply didn't know the word "barcode".
Also I think I've read somewhere that it's even doubtful that the Voynich Manuscript is even from the middle ages.
mx @antonia, "Δ-44203 is a QR code".
alt text, because something eats it whenever this one tries to submit it: "the shell of Δ-44203 is marked with the carbo symbol, the text "delta 44203" and a barcode encoding the number 44203."