QR码，条形码和NFC之间的区别

1.条码：
条形码是一种广泛使用的方法，以计算机可理解的格式以图形方式存储信息。它使用行和空格来存储数字。可以通过计算机使用扫描仪(也称为条形码扫描仪)检索存储的号码。其中，它广泛用于零售，汽车租赁，住院治疗行业。

扫描到GeeksforGeeks的条形码–

2. QR码：
QR码是用于存储数据的二维条形码。通过QR扫描仪对代码进行扫描，以访问存储在其中的信息。它们于1994年在日本开发。它们是水平和垂直存储多媒体数据(视频，音频，图片，链接等)的方法。

扫描到www.geeksforgeeks.org的QR码–

3.近场通信(NFC)：
它是由Phillips和Sony于2002年推出的。 NFC是一种近场通信方法，在距离保持在4厘米或更短距离的2个设备之间传输数据时非常有用。它基于耦合(感应耦合)原理。

NFC扬声器–

QR码，条形码和NFC之间的区别：

S.No.	Barcode	QR code	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.