Barcode



A barcode was a printed sequence of parallel bars of varying thickness. The bars represented the binary numbers 0 and 1, which could in turn be grouped in longer sequences to represent the numbers 0 to 9. Barcodes were included on Muggle consumer goods and could be read by optical-scanning machines to allow products to be quickly inventoried and identified.

The Quibbler published a teaser for an upcoming article explaining barcodes in a 1996 issue.

Appearances

 * Harry Potter and the Half-Blood Prince (film)