Are QR Codes for Real? —Sherburne

QR codes use two-dimensional barcodes, or 2D barcodes, that can use patterns of squares, dots, hexagons and other geometric patterns within images. Sometimes these are called matrix codes. QR means Quick Response.

Interestingly, Denso invented them for tracking parts in vehicle manufacturing, but now they are used in a much broader context. How broad? A Google search for the term "QR Code generator" resulted in nearly 100,000 results.