A Quick Response (QR) code is a machine-readable code made up of black and white squares read by the camera of a smartphone or other device reader.
QR Codes originated in Japan in 1994 to track vehicles during the manufacturing process. Now you see them everywhere – such as URLs in print ads, boarding passes, Bitcoin public keys. The key is the ubiquity of the smartphone camera that can read them. There are specialized QR Code readers (think of boarding pass readers at airports), but the key is the ubiquity of the smartphone camera that can read them.
For more on this story visit the following link: How the humble QR code may usher in the cashless society, starting in India
Source: Daily Fintech