1. Barcode :
Barcode is a widely used method to store information pictorially in a computer understandable format. It uses lines and spaces to store numbers. The stored numbers can be retrieved by the computer using a scanner also known as the barcode scanner. Among others, it is used extensively in retail, car rental, hospitalization industries.
Barcode that scans to GeeksforGeeks –
2. QR code :
QR codes are two-dimensional barcodes that are used to store data. The codes are scanned by a QR scanner to get access to the information stored in it. They were developed in the year 1994, in Japan. They are a method of storing multimedia data (video, audio, pictures, links etc.) horizontally and vertically.
QR Code that scans to www.geeksforgeeks.org –
3. Near Field Communication (NFC) :
It was introduced in the year 2002 by Phillips and Sony. NFC is a Near Field Communication method that becomes very useful in transferring data between 2 devices that are kept in a distance of 4 centimetre or less. It is based on the principle of coupling (inductive coupling).
NFC on a speaker –
Difference between QR Code, Bar Code and NFC :
|1.||It was developed in the year 1952.||It was developed in the year 1994.||It was developed in the year 2002.|
|2.||It was developed by Norman Joseph Woodland.||It was developed by Masahiro Hara.||It was developed by Franz Amtmann and Philippe Mangars.|
|3.||There are 2 types, 1 dimentional and 2 dimentional, or barcodes.||There is only of 1 type.||There is only of 1 type.|
|4.||It is a way of storing numbers in a printed and computer understandable format.||It is a type of 2D barcode or printed representation of data that can be scanned for data retrieval.||It is a communication protocol for communication between devices (electronic) within a distance of 4cm.|
|5.||It is used at stores for tracking all purchased items, in hospitals for tracking the records of patients, in rental cars business and tracking of airline luggage, mails and nuclear waste.||It is used in supermarkets, hospitals, cinema or by individuals etc. for transfer of data (sharing contacts, photos, videos and other documents.).||It is used as identity cards, as key cards and as a method of contactless payments and mobile payments in various sectors such as retail, automobile, cinema etc.|
|6.||It is based on Morse Code technology.||It is based on Morse Code technology.||It is based on inductive coupling between antennas of the devices.|
|7.||It requires line of sight.||It requires line of sight.||It requires proximity (distance between the devices must be less than 4 centimetres, hence the name, Near field).|
|8.||Only one barcode is examined at once.||Only one QR code is examined at once.||Only one NFC is examined at once.|