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QR Code is a machine-readable code consisting of an array of black and white squares, typically used for storing URLs or other information for reading by the camera on a smartphone.
It is first designed in 1994 for the automotive industry in Japan.
The Quick Response (QR code) system became popular outside the automotive industry due to its fast readability and greater storage capacity compared to standard UPC bar codes
A QR code consists of black squares arranged in a square grid on a white background, which can be read by an imaging device such as a camera, and processed using Reed–Solomon error correction until the image can be appropriately interpreted. The required data is then extracted from patterns that are present in both horizontal and vertical components of the image.
USES:
Mobile operating systems
URLs
Virtual stores
Code payments
Website login
WiFi network login
Funerary use
Transcripts and Degrees
Encryption
Video games