1.二维码：
二维码是一种以二维表示形式存储数据的方式。它也是条形码的一种形式。 QR码于1994年开发，通过QR扫描仪扫描以获取其代表的信息。它水平和垂直存储数据。
扫描到 www.geeksforgeeks.org 的二维码
2. 近场通信(NFC)：
NFC 是 2002 年开发的相对较新的技术。它是为使用电感耦合在两个设备之间进行通信而开发的。它提供 4 厘米内设备的低速连接。设置 NFC 技术非常简单。它广泛用于无现金支付。
扬声器上的 NFC
二维码与NFC的区别：
| S.No. | QR code | NFC |
|---|---|---|
| 1. | It was developed in 1994. | It was developed in 2002. |
| 2. | It was developed by Masahiro Hara. | It was developed by Franz Amtmann and Philippe Mangars. |
| 3. | It is only of 1 type. | It is only of 1 type. |
| 4. | 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 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 inductive coupling between antennas of the devices. |
| 7. | 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 QR code is examined at once. | Only one NFC is examined at once. |