QR Code is a two-dimensional version of the barcode, typically made up of black and white pixel patterns. It is invented in 1994 by the Japanese automotive company Denso Wave. A QR Code can encode numerals, alphabetical characters, symbols, binary data, control codes, and other data. There is no need for the user to write down or key in a website address. The data stored in a QR code can include website URLs, phone numbers, etc. QR codes can store about 7,000 digits or around 4,000 characters, including punctuation and special characters. QR Codes can be read at high speed regardless of the scanning angleQR codes can be scanned anywhere. Since QR Codes encode data in the transverse and longitudinal directions, a QR code can represent data using approximately 10 times less space than a traditional barcode. Hence QR codes can hold digits. Additional InformationTypes of Quick Response (QR) CodesThere are a number of QR code types that may be used for different items. They include:Micro QR Code: A smaller version of a traditional QR code that is used when space is limited. Model 1 QR Codes: Model 1 is the prototype of Model 2 and Micro QR. Model 2 QR Codes: Model 2 has an alignment pattern for better position adjustment and contains greater data density than Model 1. IQR Code: Can be created in squares or rectangles in cases where space or shape is an issue. It can be in any one of 61 formats. SQRC: Features a restricted reading function to contain private information. Frame QR: Customizable frame that can contain larger data in formats such as graphics, illustrations, or photos.