Answer:
QR code
Step-by-step explanation:
QR code stands for Quick Response code.It is also known as Barcode and was first designed in 1994. It is made up of black squares lined up in a square grid usually on a white background and are read by a camera etc.
QR codes often contain data for a locator, identifier, or tracker that directs one to a website or application and it uses four encoding modes namely:numeric, alphanumeric, byte/binary, and kanji to store data competently.