About QR Code Technology

QR Code (abbreviated from Quick Response Code) is the trademark for a type of matrix barcode (or two-dimensional code) first designed for the automotive industry.

More recently, the system has become popular outside the industry due to its fast readability and large storage capacity compared to standard UPC barcodes. The code consists of black modules (square dots) arranged in a square pattern on a white background. The information encoded can be made up of four standardized kinds ("modes") of data (numeric, alphanumeric, byte/binary, Kanji), or through supported extensions, virtually any kind of data.

Wikipedia

Features of QR Codes

QR Codes have a high storage capacity compared with regular barcodes.

A choice of four error correction levels allows you to choose between tighter, smaller codes (low ECL), and a greater ability to sustain damage (high ECL).

Data encoding follows a specific pattern of reference areas, metadata areas, and data areas.